Correct avatar debug error message: Refs #5747
Correct avatar debug error message: Refs #5747

The old message implied the avatar image was being loaded, not that
the URL was being injected into the document.

martinra/geary,kyoushuu/geary,tshikaboom/geary,glebihan/geary,tshikaboom/geary,rschroll/geary,AtticHacker/geary,AtticHacker/geary,aatishnn/geary,tshikaboom/geary,kyoushuu/geary,kpiwko/geary,jimbonator/geary,robol/geary,githubnemo/geary,glebihan/geary,mjog/geary,martinra/geary,robol/geary,emersion/geary,glebihan/geary,aatishnn/geary,abn/geary,mjog/geary,emersion/geary,emersion/geary,githubnemo/geary,MohamedIM/geary-unofficial,rschroll/geary,mjog/geary,geekvigilante/geary,githubnemo/geary,mpdeimos/geary,jimbonator/geary,AtticHacker/geary,aatishnn/geary,jimbonator/geary,robol/geary,martinra/geary