fix: Do not try to decrement attribute count below 0
fix: Do not try to decrement attribute count below 0

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