fix: [taxonomies] non initialised variable throwing notices fixed
fix: [taxonomies] non initialised variable throwing notices fixed

FIRSTdotorg/MISP,FloatingGhost/MISP,FloatingGhost/MISP,SteveClement/MISP,SteveClement/MISP,SteveClement/MISP,FloatingGhost/MISP,MISP/MISP,FIRSTdotorg/MISP,SteveClement/MISP,SteveClement/MISP,MISP/MISP,FloatingGhost/MISP,FIRSTdotorg/MISP,MISP/MISP,MISP/MISP,MISP/MISP,FIRSTdotorg/MISP