drivers/sx127x: Fix -Wmaybe-uninitialized warning
drivers/sx127x: Fix -Wmaybe-uninitialized warning

authmillenon/RIOT,smlng/RIOT,cladmi/RIOT,kaspar030/RIOT,A-Paul/RIOT,cladmi/RIOT,cladmi/RIOT,BytesGalore/RIOT,biboc/RIOT,josephnoir/RIOT,neiljay/RIOT,kbumsik/RIOT,gebart/RIOT,aeneby/RIOT,yogo1212/RIOT,mtausig/RIOT,ant9000/RIOT,mtausig/RIOT,neiljay/RIOT,RIOT-OS/RIOT,basilfx/RIOT,kYc0o/RIOT,mfrey/RIOT,lazytech-org/RIOT,avmelnikoff/RIOT,kaspar030/RIOT,jasonatran/RIOT,josephnoir/RIOT,kbumsik/RIOT,josephnoir/RIOT,OlegHahm/RIOT,toonst/RIOT,ant9000/RIOT,biboc/RIOT,basilfx/RIOT,kaspar030/RIOT,kaspar030/RIOT,LudwigKnuepfer/RIOT,LudwigKnuepfer/RIOT,LudwigOrtmann/RIOT,mfrey/RIOT,avmelnikoff/RIOT,x3ro/RIOT,aeneby/RIOT,OlegHahm/RIOT,gebart/RIOT,smlng/RIOT,gebart/RIOT,avmelnikoff/RIOT,ant9000/RIOT,LudwigKnuepfer/RIOT,kbumsik/RIOT,A-Paul/RIOT,aeneby/RIOT,OTAkeys/RIOT,LudwigOrtmann/RIOT,gebart/RIOT,lazytech-org/RIOT,jasonatran/RIOT,LudwigKnuepfer/RIOT,rfuentess/RIOT,mfrey/RIOT,OlegHahm/RIOT,miri64/RIOT,kYc0o/RIOT,basilfx/RIOT,mfrey/RIOT,kYc0o/RIOT,authmillenon/RIOT,OTAkeys/RIOT,LudwigKnuepfer/RIOT,BytesGalore/RIOT,mtausig/RIOT,RIOT-OS/RIOT,x3ro/RIOT,biboc/RIOT,OlegHahm/RIOT,cladmi/RIOT,yogo1212/RIOT,RIOT-OS/RIOT,mtausig/RIOT,josephnoir/RIOT,lazytech-org/RIOT,A-Paul/RIOT,neiljay/RIOT,LudwigOrtmann/RIOT,miri64/RIOT,LudwigOrtmann/RIOT,neiljay/RIOT,rfuentess/RIOT,kbumsik/RIOT,jasonatran/RIOT,BytesGalore/RIOT,toonst/RIOT,kbumsik/RIOT,toonst/RIOT,kaspar030/RIOT,kYc0o/RIOT,A-Paul/RIOT,smlng/RIOT,ant9000/RIOT,jasonatran/RIOT,OTAkeys/RIOT,LudwigOrtmann/RIOT,mfrey/RIOT,mtausig/RIOT,biboc/RIOT,basilfx/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,BytesGalore/RIOT,biboc/RIOT,toonst/RIOT,miri64/RIOT,OTAkeys/RIOT,josephnoir/RIOT,x3ro/RIOT,authmillenon/RIOT,BytesGalore/RIOT,authmillenon/RIOT,miri64/RIOT,LudwigOrtmann/RIOT,cladmi/RIOT,A-Paul/RIOT,smlng/RIOT,smlng/RIOT,x3ro/RIOT,OTAkeys/RIOT,avmelnikoff/RIOT,yogo1212/RIOT,jasonatran/RIOT,rfuentess/RIOT,ant9000/RIOT,kYc0o/RIOT,yogo1212/RIOT,yogo1212/RIOT,aeneby/RIOT,neiljay/RIOT,aeneby/RIOT,OlegHahm/RIOT,x3ro/RIOT,lazytech-org/RIOT,miri64/RIOT,rfuentess/RIOT,avmelnikoff/RIOT,gebart/RIOT,basilfx/RIOT,RIOT-OS/RIOT,lazytech-org/RIOT,rfuentess/RIOT,yogo1212/RIOT,toonst/RIOT,authmillenon/RIOT