Cannot resize windows smaller than their initial size under Unity

[Glenn Moss]

This is a regression of previous behavior where the user could resize the puzzle window as small as desired.

New logic was introduced to gtk.c in sgt's svn repo (http://svn.tartarus.org/sgt/puzzles) revision 9711 that conflicts with Unity's global menus. The logic in gtk.c now checks for certain GtkWidgets having a height or width of 0, assuming that means it is not fully initialized and thus does not yet allow resizing smaller than the current size. However, under Unity, (either Global or Locally Integrated Menus), the GtkMenuBar always has a height and width of 0. Thus the puzzle window is never permitted to be resized smaller than its initial size.

As a note, if the puzzle is added to the dconf key com.canonical.unity-gtk-module blacklist, then resizing works as expected.