[Freeciv-Dev] add wall text to popup

[Greg Wooledge <wooledge@xxxxxxxxxxx>]

This adds some text to the popup if a city has walls.  (This may seem
silly since the walls are in the picture, but I think it's a nice
feature.  Note that tile infrastructure (roads, etc.) gets treated this
way as well.)

The gui-gtk part is tested.  The gui-xaw part is not.

fc-popup-walls.diff
Description: Text document