a5324462c3
Add a short-circuit when the size doesn't change. Taken from part of 26580f8f2c (Giovanni Campagna). This greatly reduces the reentrancy of recreating icons that seems to be responsible for many crashers, though the exact mechanism for the crashes isn't clear. See: https://bugzilla.gnome.org/show_bug.cgi?id=648450 https://bugzilla.redhat.com/show_bug.cgi?id=707652 https://bugzilla.redhat.com/show_bug.cgi?id=781780