Fix bug in AttachmentsController#show
Fix bug in AttachmentsController#show

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