sys/auto_init: fix crash with io1_xplained driver
sys/auto_init: fix crash with io1_xplained driver

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