fix: Fix a rare issue with zombie sighting data throwing a notice
fix: Fix a rare issue with zombie sighting data throwing a notice

SteveClement/MISP,Rafiot/MISP,devnull-/MISP,FIRSTdotorg/MISP,MISP/MISP,FloatingGhost/MISP,TheDr1ver/MISP,TheDr1ver/MISP,SteveClement/MISP,Rafiot/MISP,FIRSTdotorg/MISP,MISP/MISP,devnull-/MISP,devnull-/MISP,devnull-/MISP,MISP/MISP,MISP/MISP,FIRSTdotorg/MISP,SteveClement/MISP,FloatingGhost/MISP,TheDr1ver/MISP,FloatingGhost/MISP,SteveClement/MISP,Rafiot/MISP,MISP/MISP,FloatingGhost/MISP,Rafiot/MISP,SteveClement/MISP,TheDr1ver/MISP,FIRSTdotorg/MISP