Bugfixed: chat crashed with a user without timezone
Bugfixed: chat crashed with a user without timezone

arrivu/web-conf,arrivu/web-conf,mconf-rnp/mconf-web,mconf-ufrgs/mconf-web,ging/vcc,mconftec/mconf-web-santacasa,mconftec/mconf-web-ufpe,lfzawacki/mconf-web,amreis/mconf-web,ging/vcc,mconf-ufrgs/mconf-web,arrivu/web-conf,mconf/mconf-web,fbottin/mconf-web,ging/vcc,becueb/MconfWeb,becueb/MconfWeb,mconf-ufrgs/mconf-web,arrivu/web-conf,m-narayan/agora-conf,mconftec/mconf-web-uergs,amreis/mconf-web,amreis/mconf-web,m-narayan/agora-conf,fbottin/mconf-web,fbottin/mconf-web,akratech/Akraconference,mconftec/mconf-web-ufpe,ging/vcc,arrivu/web-conf,becueb/MconfWeb,m-narayan/agora-conf,becueb/MconfWeb,m-narayan/agora-conf,mconftec/mconf-web-santacasa,akratech/Akraconference,mconftec/mconf-web-mytruecloud,akratech/Akraconference,ging/vcc,arrivu/web-conf,mconf-rnp/mconf-web,mconf/mconf-web,mconftec/mconf-web-mytruecloud,lfzawacki/mconf-web,mconftec/mconf-web-santacasa,lfzawacki/mconf-web,ging/vcc,mconftec/mconf-web-ufpe,mconf-rnp/mconf-web,arrivu/web-conf,mconftec/mconf-web-cedia,mconftec/mconf-web-ufpe,mconftec/mconf-web-uergs,mconf/mconf-web,mconftec/mconf-web-cedia,mconf/mconf-web,mconf-rnp/mconf-web,mconftec/mconf-web-mytruecloud,mconftec/mconf-web-mytruecloud,lfzawacki/mconf-web,m-narayan/agora-conf,m-narayan/agora-conf,mconf-ufrgs/mconf-web,fbottin/mconf-web,ging/vcc,mconftec/mconf-web-uergs,mconftec/mconf-web-cedia,mconftec/mconf-web-santacasa,amreis/mconf-web,m-narayan/agora-conf,mconftec/mconf-web-uergs,akratech/Akraconference