Fix containsUser if user is none
Fix containsUser if user is none

ThiefMaster/indico,mic4ael/indico,pferreir/indico,OmeGak/indico,pferreir/indico,mvidalgarcia/indico,pferreir/indico,ThiefMaster/indico,OmeGak/indico,mvidalgarcia/indico,DirkHoffmann/indico,indico/indico,indico/indico,indico/indico,indico/indico,DirkHoffmann/indico,mic4ael/indico,DirkHoffmann/indico,ThiefMaster/indico,mvidalgarcia/indico,OmeGak/indico,DirkHoffmann/indico,mic4ael/indico,OmeGak/indico,mic4ael/indico,mvidalgarcia/indico,pferreir/indico,ThiefMaster/indico