fix: Empty events are created when pulling empty feeds, fixes #3008
fix: Empty events are created when pulling empty feeds, fixes #3008

- as described by Emanuele Acri (@crossbowerbt)

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