Dnd and textview

[Emmanuel Briot <briot act-europe fr>]

The textview widget doesn't pass dnd operations/signals to its parent
when there is no supported type. The fix is simple, in
gtk_text_view_drag_motion:



  if (gtk_drag_dest_find_target (widget, context,
                                 gtk_drag_dest_get_target_list (widget)) == GDK_NONE)
    {
      /* can't accept any of the offered targets */
+      return FALSE;
    }