sys/.../icmp.c: fix prefix search
sys/.../icmp.c: fix prefix search

Replace equal operator inside ndp_prefix_info_search by not equal.
Otherwise, the existing prefix can not be found.

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