tests/posix_semaphore: test4: BUG add '\0' after fmt_u64_dec
tests/posix_semaphore: test4: BUG add '\0' after fmt_u64_dec

fmt_u64_dec does not include the terminating null string character.

BytesGalore/RIOT,lazytech-org/RIOT,RIOT-OS/RIOT,BytesGalore/RIOT,kbumsik/RIOT,avmelnikoff/RIOT,cladmi/RIOT,roberthartung/RIOT,RIOT-OS/RIOT,LudwigKnuepfer/RIOT,adrianghc/RIOT,lazytech-org/RIOT,yogo1212/RIOT,josephnoir/RIOT,LudwigOrtmann/RIOT,mtausig/RIOT,immesys/RiSyn,avmelnikoff/RIOT,authmillenon/RIOT,Josar/RIOT,kaspar030/RIOT,toonst/RIOT,smlng/RIOT,basilfx/RIOT,jasonatran/RIOT,gebart/RIOT,biboc/RIOT,gebart/RIOT,mfrey/RIOT,OTAkeys/RIOT,kbumsik/RIOT,Josar/RIOT,BytesGalore/RIOT,yogo1212/RIOT,rfuentess/RIOT,OlegHahm/RIOT,basilfx/RIOT,yogo1212/RIOT,cladmi/RIOT,ant9000/RIOT,LudwigKnuepfer/RIOT,ks156/RIOT,miri64/RIOT,jasonatran/RIOT,immesys/RiSyn,yogo1212/RIOT,aeneby/RIOT,toonst/RIOT,LudwigOrtmann/RIOT,kaspar030/RIOT,jasonatran/RIOT,immesys/RiSyn,ks156/RIOT,aeneby/RIOT,gebart/RIOT,ant9000/RIOT,hamilton-mote/RIOT-OS,josephnoir/RIOT,RIOT-OS/RIOT,A-Paul/RIOT,OlegHahm/RIOT,authmillenon/RIOT,kaspar030/RIOT,adrianghc/RIOT,LudwigKnuepfer/RIOT,Josar/RIOT,rfuentess/RIOT,adrianghc/RIOT,aeneby/RIOT,cladmi/RIOT,cladmi/RIOT,LudwigOrtmann/RIOT,jasonatran/RIOT,toonst/RIOT,yogo1212/RIOT,smlng/RIOT,rfuentess/RIOT,rfuentess/RIOT,josephnoir/RIOT,kYc0o/RIOT,basilfx/RIOT,toonst/RIOT,mfrey/RIOT,LudwigKnuepfer/RIOT,neiljay/RIOT,authmillenon/RIOT,BytesGalore/RIOT,authmillenon/RIOT,cladmi/RIOT,miri64/RIOT,kaspar030/RIOT,RIOT-OS/RIOT,biboc/RIOT,biboc/RIOT,LudwigOrtmann/RIOT,mtausig/RIOT,LudwigOrtmann/RIOT,A-Paul/RIOT,adrianghc/RIOT,neiljay/RIOT,x3ro/RIOT,lazytech-org/RIOT,roberthartung/RIOT,adrianghc/RIOT,hamilton-mote/RIOT-OS,lazytech-org/RIOT,immesys/RiSyn,ks156/RIOT,jasonatran/RIOT,LudwigOrtmann/RIOT,authmillenon/RIOT,hamilton-mote/RIOT-OS,x3ro/RIOT,neiljay/RIOT,aeneby/RIOT,miri64/RIOT,toonst/RIOT,OTAkeys/RIOT,A-Paul/RIOT,authmillenon/RIOT,roberthartung/RIOT,A-Paul/RIOT,kYc0o/RIOT,BytesGalore/RIOT,gebart/RIOT,biboc/RIOT,miri64/RIOT,kbumsik/RIOT,mfrey/RIOT,x3ro/RIOT,josephnoir/RIOT,avmelnikoff/RIOT,miri64/RIOT,RIOT-OS/RIOT,josephnoir/RIOT,neiljay/RIOT,lazytech-org/RIOT,ks156/RIOT,gebart/RIOT,smlng/RIOT,aeneby/RIOT,roberthartung/RIOT,Josar/RIOT,immesys/RiSyn,neiljay/RIOT,OTAkeys/RIOT,smlng/RIOT,smlng/RIOT,biboc/RIOT,x3ro/RIOT,yogo1212/RIOT,kbumsik/RIOT,ant9000/RIOT,avmelnikoff/RIOT,OlegHahm/RIOT,ks156/RIOT,LudwigKnuepfer/RIOT,hamilton-mote/RIOT-OS,ant9000/RIOT,kbumsik/RIOT,kYc0o/RIOT,immesys/RiSyn,A-Paul/RIOT,mfrey/RIOT,roberthartung/RIOT,mfrey/RIOT,hamilton-mote/RIOT-OS,OlegHahm/RIOT,mtausig/RIOT,mtausig/RIOT,kYc0o/RIOT,basilfx/RIOT,Josar/RIOT,kaspar030/RIOT,OlegHahm/RIOT,basilfx/RIOT,OTAkeys/RIOT,ant9000/RIOT,kYc0o/RIOT,avmelnikoff/RIOT,OTAkeys/RIOT,rfuentess/RIOT,x3ro/RIOT,mtausig/RIOT