[AD] Patch to unregister switch bitmap in src/graphics.c (4.3.10)

[Colin Ward <lists@xxxxxxxxxx>]

Hi all.

When a client program calls set_gfx_mode(), it ends up calling
_set_gfx_mode(), which adds the bitmap created to represent the screen to a
list of "switch" bitmaps.  But it never removes it, which results in a
memory leak.  Please find attached a patch to remove this bitmap from the
"switch" list in shutdown_gfx().

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--- src/graphics.c	(revision 10988)
+++ src/graphics.c	(working copy)
@@ -455,6 +455,8 @@
  */
 static void shutdown_gfx(void)
 {
+   _unregister_switch_bitmap(screen);
+
    if (gfx_driver)
       set_gfx_mode(GFX_TEXT, 0, 0, 0, 0);