From 8cfa737d4e9cf94b623e6fb0d625e9196748acfb Mon Sep 17 00:00:00 2001
From: Michael Gernoth <michael@gernoth.net>
Date: Wed, 16 Jan 2008 23:15:09 +0100
Subject: [PATCH] fix for crash when falling back from shared memory to wired
 mode. (the big_tile_pixmap is inaccessible while it is recreated, so  do not
 try to access it)

---
 src/sim/g_bigmap.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/sim/g_bigmap.c b/src/sim/g_bigmap.c
index d70225d..2b2bb9d 100644
--- a/src/sim/g_bigmap.c
+++ b/src/sim/g_bigmap.c
@@ -310,9 +310,11 @@ WireDrawBeegMapRect(SimView *view, short x, short y, short w, short h)
 
       if (tile != *ha) {
 	*ha = tile;
-	XCopyArea(view->x->dpy, view->x->big_tile_pixmap, view->pixmap,
+	if (view->x->big_tile_pixmap) {
+	  XCopyArea(view->x->dpy, view->x->big_tile_pixmap, view->pixmap,
 		  view->x->gc, 0, tile * 16, 16, 16,
 		  col * 16, row * 16);
+	}
       }
     }
     map += mm;
-- 
2.39.2