Bug#407035: Bug fixed in gtk+ 2.10.x series, workaround removed

[Attilio Fiandrotti <attilio.fiandrotti@gmail.com>]

Hi

I just removed the workaround i previously introduced for this bug (see 
r48749) because it was fixed upstream in recent gtk+ 2.10.x releases.
You may now notice warning messages by gtk/dfb when performing d'n'd: 
those are due to a minor gtk/dfb issue i'm going to address upstream 
very soon.

regards

Attilio