(svn r7616) -Cleanup:

 -(re)set _rename_[id/what] to -1 to catch invalid calls (main_gui.c)
 -Only invalidate widget of pause/ff instead of whole window (main_gui.c)
 -Remove numbering from WE_ and WC_ as it's not needed, also remove
  non-existing windowclasses (window.h, openttd.h)
 -Give names to some of the enums (window.h)
 -In UninitWindowSystem not only free malloc'd widgets, but also reset the z-array (window.c)
 -Some coding style, comments, etc.
 

1 files changed, 4 insertions, 2 deletions

diff --git a/window.c b/window.c
index d29963069..1b7431219 100644
--- a/window.c
+++ b/window.c
@@ -875,13 +875,15 @@ void InitWindowSystem(void)
 
 void UnInitWindowSystem(void)
 {
-	Window* const *wz;
-	// delete all malloced widgets
+	Window **wz;
+	/* Delete all malloced widgets, and reset z-array */
 	FOR_ALL_WINDOWS(wz) {
 		free((*wz)->widget);
 		(*wz)->widget = NULL;
 		(*wz)->widget_count = 0;
+		*wz = NULL;
 	}
+	_last_z_window = _z_windows;
 }
 
 void ResetWindowSystem(void)