Don't try to double free the avatar data (#598423).
Don't try to double free the avatar data (#598423).

Also, simplify the code for loading the avatar data from the file.

GNOME/telepathy-account-widgets,Distrotech/telepathy-account-widgets,GNOME/telepathy-account-widgets,Distrotech/telepathy-account-widgets,GNOME/telepathy-account-widgets