cpu: stm32f3: periph: gpio: fix possibly uninitialized variable access
cpu: stm32f3: periph: gpio: fix possibly uninitialized variable access

gbarnett/RIOT,mtausig/RIOT,gautric/RIOT,ant9000/RIOT,attdona/RIOT,sumanpanchal/RIOT,lazytech-org/RIOT,rousselk/RIOT,yogo1212/RIOT,neumodisch/RIOT,patkan/RIOT,koenning/RIOT,ntrtrung/RIOT,OTAkeys/RIOT,asanka-code/RIOT,haoyangyu/RIOT,smlng/RIOT,rfuentess/RIOT,RIOT-OS/RIOT,Ell-i/RIOT,abkam07/RIOT,latsku/RIOT,alex1818/RIOT,josephnoir/RIOT,robixnai/RIOT,Darredevil/RIOT,JensErdmann/RIOT,d00616/RIOT,kYc0o/RIOT,benoit-canet/RIOT,abkam07/RIOT,gautric/RIOT,kbumsik/RIOT,l3nko/RIOT,marcosalm/RIOT,LudwigOrtmann/RIOT,koenning/RIOT,herrfz/RIOT,jasonatran/RIOT,DipSwitch/RIOT,ks156/RIOT,robixnai/RIOT,benoit-canet/RIOT,MonsterCode8000/RIOT,TobiasFredersdorf/RIOT,ThanhVic/RIOT,brettswann/RIOT,yogo1212/RIOT,zhuoshuguo/RIOT,herrfz/RIOT-old,jremmert-phytec-iot/RIOT,tdautc19841202/RIOT,lazytech-org/RIOT,stevenj/RIOT,lazytech-org/RIOT,rousselk/RIOT,bartfaizoltan/RIOT,backenklee/RIOT,automote/RIOT,MonsterCode8000/RIOT,immesys/RiSyn,ximus/RIOT,MohmadAyman/RIOT,yogo1212/RIOT,daniel-k/RIOT,gautric/RIOT,attdona/RIOT,kb2ma/RIOT,FrancescoErmini/RIOT,rfswarm/RIOT,fnack/RIOT,thiagohd/RIOT,thiagohd/RIOT,kushalsingh007/RIOT,wentaoshang/RIOT,aeneby/RIOT,plushvoxel/RIOT,Ell-i/RIOT,binarylemon/RIOT,OlegHahm/RIOT,koenning/RIOT,miri64/RIOT,neumodisch/RIOT,backenklee/RIOT,asanka-code/RIOT,watr-li/RIOT,abkam07/RIOT,Ell-i/RIOT,cladmi/RIOT,Josar/RIOT,kushalsingh007/RIOT,stevenj/RIOT,miri64/RIOT,MarkXYang/RIOT,stevenj/RIOT,RIOT-OS/RIOT,lazytech-org/RIOT,mziegert/RIOT,herrfz/RIOT,PSHIVANI/Riot-Code,patkan/RIOT,thomaseichinger/RIOT,gbarnett/RIOT,Hyungsin/RIOT-OS,gebart/RIOT,jremmert-phytec-iot/RIOT,gebart/RIOT,dhruvvyas90/RIOT,ximus/RIOT,malosek/RIOT,MonsterCode8000/RIOT,malosek/RIOT,MarkXYang/RIOT,chris-wood/RIOT,RubikonAlpha/RIOT,RIOT-OS/RIOT,haoyangyu/RIOT,thomaseichinger/RIOT,LudwigOrtmann/RIOT,kbumsik/RIOT,sgso/RIOT,brettswann/RIOT,fnack/RIOT,chris-wood/RIOT,josephnoir/RIOT,herrfz/RIOT,TobiasFredersdorf/RIOT,avmelnikoff/RIOT,l3nko/RIOT,LudwigKnuepfer/RIOT,rousselk/RIOT,ks156/RIOT,biboc/RIOT,rajma996/RIOT,fnack/RIOT,tfar/RIOT,abp719/RIOT,msolters/RIOT,Hyungsin/RIOT-OS,dailab/RIOT,herrfz/RIOT,kYc0o/RIOT,dhruvvyas90/RIOT,brettswann/RIOT,luciotorre/RIOT,benoit-canet/RIOT,katezilla/RIOT,asanka-code/RIOT,benoit-canet/RIOT,smlng/RIOT,RIOT-OS/RIOT,binarylemon/RIOT,abkam07/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,EmuxEvans/RIOT,Josar/RIOT,zhuoshuguo/RIOT,adrianghc/RIOT,JensErdmann/RIOT,abkam07/RIOT,tdautc19841202/RIOT,authmillenon/RIOT,robixnai/RIOT,rfswarm/RIOT,sumanpanchal/RIOT,sgso/RIOT,beurdouche/RIOT,TobiasFredersdorf/RIOT,hamilton-mote/RIOT-OS,d00616/RIOT,A-Paul/RIOT,rfswarm/RIOT,Osblouf/RIOT,dkm/RIOT,PSHIVANI/Riot-Code,jremmert-phytec-iot/RIOT,fnack/RIOT,neumodisch/RIOT,A-Paul/RIOT,changbiao/RIOT,Yonezawa-T2/RIOT,adrianghc/RIOT,gbarnett/RIOT,lebrush/RIOT,watr-li/RIOT,arvindpdmn/RIOT,abp719/RIOT,thomaseichinger/RIOT,LudwigOrtmann/RIOT,l3nko/RIOT,gautric/RIOT,sumanpanchal/RIOT,automote/RIOT,LudwigKnuepfer/RIOT,RBartz/RIOT,neumodisch/RIOT,watr-li/RIOT,thiagohd/RIOT,MohmadAyman/RIOT,phiros/RIOT,neiljay/RIOT,PSHIVANI/Riot-Code,FrancescoErmini/RIOT,neumodisch/RIOT,adjih/RIOT,ThanhVic/RIOT,jferreir/RIOT,MarkXYang/RIOT,BytesGalore/RIOT,ks156/RIOT,watr-li/RIOT,d00616/RIOT,rajma996/RIOT,ximus/RIOT,koenning/RIOT,MohmadAyman/RIOT,wentaoshang/RIOT,PSHIVANI/Riot-Code,MohmadAyman/RIOT,jremmert-phytec-iot/RIOT,josephnoir/RIOT,miri64/RIOT,kerneltask/RIOT,basilfx/RIOT,msolters/RIOT,beurdouche/RIOT,automote/RIOT,neumodisch/RIOT,rakendrathapa/RIOT,JensErdmann/RIOT,Darredevil/RIOT,l3nko/RIOT,changbiao/RIOT,jasonatran/RIOT,RIOT-OS/RIOT,avmelnikoff/RIOT,rfswarm/RIOT,jasonatran/RIOT,mziegert/RIOT,x3ro/RIOT,FrancescoErmini/RIOT,kYc0o/RIOT,kushalsingh007/RIOT,MarkXYang/RIOT,alignan/RIOT,latsku/RIOT,bartfaizoltan/RIOT,wentaoshang/RIOT,sgso/RIOT,centurysys/RIOT,hamilton-mote/RIOT-OS,sumanpanchal/RIOT,alex1818/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,rfuentess/RIOT,Ell-i/RIOT,x3ro/RIOT,phiros/RIOT,katezilla/RIOT,haoyangyu/RIOT,BytesGalore/RIOT,kaleb-himes/RIOT,abp719/RIOT,ant9000/RIOT,A-Paul/RIOT,tdautc19841202/RIOT,latsku/RIOT,herrfz/RIOT,cladmi/RIOT,rakendrathapa/RIOT,ThanhVic/RIOT,katezilla/RIOT,wentaoshang/RIOT,jferreir/RIOT,ntrtrung/RIOT,aeneby/RIOT,adrianghc/RIOT,mtausig/RIOT,Yonezawa-T2/RIOT,khhhh/RIOT,asanka-code/RIOT,dailab/RIOT,kYc0o/RIOT,mziegert/RIOT,robixnai/RIOT,kaspar030/RIOT,phiros/RIOT,BytesGalore/RIOT,herrfz/RIOT,kerneltask/RIOT,abkam07/RIOT,patkan/RIOT,authmillenon/RIOT,robixnai/RIOT,MohmadAyman/RIOT,JensErdmann/RIOT,OTAkeys/RIOT,rfswarm/RIOT,mfrey/RIOT,Osblouf/RIOT,rfuentess/RIOT,Ell-i/RIOT,thiagohd/RIOT,watr-li/RIOT,daniel-k/RIOT,plushvoxel/RIOT,malosek/RIOT,jbeyerstedt/RIOT-OTA-update,gebart/RIOT,miri64/RIOT,immesys/RiSyn,arvindpdmn/RIOT,MarkXYang/RIOT,attdona/RIOT,FrancescoErmini/RIOT,Darredevil/RIOT,msolters/RIOT,rousselk/RIOT,kushalsingh007/RIOT,malosek/RIOT,bartfaizoltan/RIOT,zhuoshuguo/RIOT,jferreir/RIOT,immesys/RiSyn,automote/RIOT,neiljay/RIOT,attdona/RIOT,herrfz/RIOT-old,watr-li/RIOT,latsku/RIOT,malosek/RIOT,A-Paul/RIOT,dkm/RIOT,kb2ma/RIOT,beurdouche/RIOT,JensErdmann/RIOT,yogo1212/RIOT,ThanhVic/RIOT,stevenj/RIOT,alignan/RIOT,Darredevil/RIOT,l3nko/RIOT,authmillenon/RIOT,RubikonAlpha/RIOT,thiagohd/RIOT,syin2/RIOT,Lexandro92/RIOT-CoAP,abp719/RIOT,gebart/RIOT,mtausig/RIOT,arvindpdmn/RIOT,tdautc19841202/RIOT,Osblouf/RIOT,brettswann/RIOT,avmelnikoff/RIOT,authmillenon/RIOT,adrianghc/RIOT,Lexandro92/RIOT-CoAP,aeneby/RIOT,brettswann/RIOT,roberthartung/RIOT,josephnoir/RIOT,altairpearl/RIOT,rajma996/RIOT,rfswarm/RIOT,basilfx/RIOT,kbumsik/RIOT,Darredevil/RIOT,jferreir/RIOT,alex1818/RIOT,rajma996/RIOT,adjih/RIOT,Hyungsin/RIOT-OS,centurysys/RIOT,dkm/RIOT,rajma996/RIOT,phiros/RIOT,toonst/RIOT,lebrush/RIOT,attdona/RIOT,koenning/RIOT,zhuoshuguo/RIOT,jfischer-phytec-iot/RIOT,MarkXYang/RIOT,TobiasFredersdorf/RIOT,kushalsingh007/RIOT,binarylemon/RIOT,sgso/RIOT,plushvoxel/RIOT,thomaseichinger/RIOT,syin2/RIOT,jremmert-phytec-iot/RIOT,A-Paul/RIOT,chris-wood/RIOT,roberthartung/RIOT,rakendrathapa/RIOT,JensErdmann/RIOT,alignan/RIOT,Yonezawa-T2/RIOT,kaspar030/RIOT,immesys/RiSyn,backenklee/RIOT,marcosalm/RIOT,brettswann/RIOT,stevenj/RIOT,LudwigKnuepfer/RIOT,sgso/RIOT,bartfaizoltan/RIOT,centurysys/RIOT,mfrey/RIOT,rakendrathapa/RIOT,mfrey/RIOT,herrfz/RIOT-old,jbeyerstedt/RIOT-OTA-update,alex1818/RIOT,neiljay/RIOT,jfischer-phytec-iot/RIOT,ant9000/RIOT,ntrtrung/RIOT,kaleb-himes/RIOT,asanka-code/RIOT,LudwigKnuepfer/RIOT,phiros/RIOT,Yonezawa-T2/RIOT,shady33/RIOT,openkosmosorg/RIOT,chris-wood/RIOT,DipSwitch/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,stevenj/RIOT,hamilton-mote/RIOT-OS,rousselk/RIOT,RBartz/RIOT,altairpearl/RIOT,backenklee/RIOT,miri64/RIOT,kYc0o/RIOT,phiros/RIOT,dhruvvyas90/RIOT,fnack/RIOT,sgso/RIOT,latsku/RIOT,DipSwitch/RIOT,Osblouf/RIOT,dailab/RIOT,koenning/RIOT,beurdouche/RIOT,jbeyerstedt/RIOT-OTA-update,BytesGalore/RIOT,tdautc19841202/RIOT,shady33/RIOT,rfuentess/RIOT,x3ro/RIOT,authmillenon/RIOT,khhhh/RIOT,DipSwitch/RIOT,RubikonAlpha/RIOT,adjih/RIOT,ant9000/RIOT,MohmadAyman/RIOT,toonst/RIOT,DipSwitch/RIOT,tfar/RIOT,altairpearl/RIOT,EmuxEvans/RIOT,jferreir/RIOT,basilfx/RIOT,haoyangyu/RIOT,patkan/RIOT,marcosalm/RIOT,Yonezawa-T2/RIOT,binarylemon/RIOT,biboc/RIOT,DipSwitch/RIOT,gbarnett/RIOT,Lexandro92/RIOT-CoAP,ntrtrung/RIOT,altairpearl/RIOT,jbeyerstedt/RIOT-OTA-update,malosek/RIOT,jasonatran/RIOT,haoyangyu/RIOT,katezilla/RIOT,syin2/RIOT,Josar/RIOT,gbarnett/RIOT,luciotorre/RIOT,FrancescoErmini/RIOT,MonsterCode8000/RIOT,tfar/RIOT,josephnoir/RIOT,sumanpanchal/RIOT,yogo1212/RIOT,lebrush/RIOT,RubikonAlpha/RIOT,asanka-code/RIOT,yogo1212/RIOT,backenklee/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,LudwigOrtmann/RIOT,aeneby/RIOT,robixnai/RIOT,shady33/RIOT,RubikonAlpha/RIOT,aeneby/RIOT,avmelnikoff/RIOT,adjih/RIOT,sumanpanchal/RIOT,EmuxEvans/RIOT,EmuxEvans/RIOT,daniel-k/RIOT,luciotorre/RIOT,RubikonAlpha/RIOT,tfar/RIOT,jremmert-phytec-iot/RIOT,cladmi/RIOT,bartfaizoltan/RIOT,daniel-k/RIOT,d00616/RIOT,ntrtrung/RIOT,centurysys/RIOT,mziegert/RIOT,arvindpdmn/RIOT,kaleb-himes/RIOT,openkosmosorg/RIOT,khhhh/RIOT,khhhh/RIOT,latsku/RIOT,toonst/RIOT,patkan/RIOT,PSHIVANI/Riot-Code,Lexandro92/RIOT-CoAP,tfar/RIOT,ntrtrung/RIOT,changbiao/RIOT,Lexandro92/RIOT-CoAP,centurysys/RIOT,openkosmosorg/RIOT,jfischer-phytec-iot/RIOT,msolters/RIOT,tdautc19841202/RIOT,abp719/RIOT,khhhh/RIOT,RBartz/RIOT,rakendrathapa/RIOT,ks156/RIOT,smlng/RIOT,Osblouf/RIOT,centurysys/RIOT,OlegHahm/RIOT,arvindpdmn/RIOT,herrfz/RIOT-old,binarylemon/RIOT,luciotorre/RIOT,kaspar030/RIOT,gbarnett/RIOT,luciotorre/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,mtausig/RIOT,openkosmosorg/RIOT,MonsterCode8000/RIOT,mziegert/RIOT,kerneltask/RIOT,d00616/RIOT,BytesGalore/RIOT,ant9000/RIOT,dhruvvyas90/RIOT,hamilton-mote/RIOT-OS,marcosalm/RIOT,herrfz/RIOT-old,altairpearl/RIOT,x3ro/RIOT,kerneltask/RIOT,openkosmosorg/RIOT,ximus/RIOT,immesys/RiSyn,ximus/RIOT,wentaoshang/RIOT,automote/RIOT,TobiasFredersdorf/RIOT,RBartz/RIOT,rousselk/RIOT,daniel-k/RIOT,wentaoshang/RIOT,FrancescoErmini/RIOT,dailab/RIOT,shady33/RIOT,dhruvvyas90/RIOT,openkosmosorg/RIOT,rakendrathapa/RIOT,adrianghc/RIOT,PSHIVANI/Riot-Code,Lexandro92/RIOT-CoAP,roberthartung/RIOT,ThanhVic/RIOT,Hyungsin/RIOT-OS,RBartz/RIOT,EmuxEvans/RIOT,mfrey/RIOT,OlegHahm/RIOT,cladmi/RIOT,gautric/RIOT,toonst/RIOT,basilfx/RIOT,jasonatran/RIOT,Osblouf/RIOT,kb2ma/RIOT,haoyangyu/RIOT,plushvoxel/RIOT,gebart/RIOT,zhuoshuguo/RIOT,biboc/RIOT,OTAkeys/RIOT,shady33/RIOT,ximus/RIOT,changbiao/RIOT,OTAkeys/RIOT,OlegHahm/RIOT,jfischer-phytec-iot/RIOT,LudwigKnuepfer/RIOT,dkm/RIOT,dkm/RIOT,EmuxEvans/RIOT,toonst/RIOT,jferreir/RIOT,OTAkeys/RIOT,adjih/RIOT,basilfx/RIOT,RBartz/RIOT,ks156/RIOT,lebrush/RIOT,neiljay/RIOT,cladmi/RIOT,changbiao/RIOT,alex1818/RIOT,kbumsik/RIOT,LudwigOrtmann/RIOT,kaspar030/RIOT,bartfaizoltan/RIOT,d00616/RIOT,kbumsik/RIOT,l3nko/RIOT,biboc/RIOT,khhhh/RIOT,authmillenon/RIOT,avmelnikoff/RIOT,kb2ma/RIOT,kaleb-himes/RIOT,kushalsingh007/RIOT,mtausig/RIOT,ThanhVic/RIOT,benoit-canet/RIOT,Josar/RIOT,msolters/RIOT,syin2/RIOT,luciotorre/RIOT,neiljay/RIOT,mziegert/RIOT,thiagohd/RIOT,lazytech-org/RIOT,jfischer-phytec-iot/RIOT,beurdouche/RIOT,OlegHahm/RIOT,katezilla/RIOT,x3ro/RIOT,fnack/RIOT,binarylemon/RIOT,smlng/RIOT,kb2ma/RIOT,rfuentess/RIOT,Josar/RIOT,marcosalm/RIOT,patkan/RIOT,marcosalm/RIOT,MonsterCode8000/RIOT,syin2/RIOT,abp719/RIOT,kaleb-himes/RIOT,zhuoshuguo/RIOT,dailab/RIOT,smlng/RIOT,changbiao/RIOT,Yonezawa-T2/RIOT,lebrush/RIOT,kerneltask/RIOT,arvindpdmn/RIOT,rajma996/RIOT,benoit-canet/RIOT,immesys/RiSyn,LudwigOrtmann/RIOT,attdona/RIOT,chris-wood/RIOT,msolters/RIOT,shady33/RIOT,hamilton-mote/RIOT-OS,kaspar030/RIOT,dhruvvyas90/RIOT,automote/RIOT,alex1818/RIOT,mfrey/RIOT,roberthartung/RIOT,altairpearl/RIOT,jbeyerstedt/RIOT-OTA-update,Darredevil/RIOT,alignan/RIOT,alignan/RIOT,roberthartung/RIOT,plushvoxel/RIOT,chris-wood/RIOT,lebrush/RIOT,thomaseichinger/RIOT,daniel-k/RIOT,biboc/RIOT,Hyungsin/RIOT-OS