From 71d7352659e2a9082b83193dd794b7225f0e0899 Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Sat, 14 Jan 2012 13:02:58 -0600
Subject: [PATCH] fix potential segfault

---
 compton.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/compton.c b/compton.c
index f4cf938d..4f30bb8d 100644
--- a/compton.c
+++ b/compton.c
@@ -1455,7 +1455,9 @@ map_win(Display *dpy, Window id,
 #endif
   w->damaged = 0;
 
-  if (fade && win_type_fade[w->window_type]) {
+  if (fade && w->window_type >= 0
+      && w->window_type < NUM_WINTYPES
+      && win_type_fade[w->window_type]) {
     set_fade(
       dpy, w, 0, get_opacity_percent(dpy, w),
       fade_in_step, 0, True, True);