[Freeciv-Dev] GTK+ client -plugged yet another memory leak

[Vasco Alexandre Da Silva Costa <vasc@xxxxxxxxxxxxxxxxxxxxx>]

The memory leak/refresh problem in the citizen pixmaps on the city dialog
has been fixed now.  The GtkPixcomm API has also seen a small boost in
functionality.

TODO:
        * The GtkPixcomm widget should be a child of GtkEventBox so we
          don't need to create one for every GtkPixcomm (the GtkEventBox 
          is used for capturing "click" events)
        * Check for memory leaks in the rates pixmaps widgets in the
          toplevel window.

I'll have very limited net access next month (August) so i probably will
only post significan patches again in September.

Happy hollydays!

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Vasco Alexandre da Silva Costa, student @ Instituto Superior Tecnico,
Technical University of Lisbon - Software & Computer Engineering