1 files changed, 2 insertions, 7 deletions
diff --git a/xserver/composite/compwindow.c b/xserver/composite/compwindow.c
index bcd230c37..f88238146 100644
--- a/xserver/composite/compwindow.c
+++ b/xserver/composite/compwindow.c
@@ -320,18 +320,13 @@ compClipNotify(WindowPtr pWin, int dx, int dy)
     }
 }
 
-/*
- * Returns TRUE if the window needs server-provided automatic redirect,
- * which is true if the child and parent aren't both regular or ARGB visuals
- */
-
-static Bool
+Bool
 compIsAlternateVisual(ScreenPtr pScreen, XID visual)
 {
     CompScreenPtr cs = GetCompScreen(pScreen);
     int i;
 
-    for (i = 0; i < cs->numAlternateVisuals; i++)
+    for (i = 0; cs && i < cs->numAlternateVisuals; i++)
         if (cs->alternateVisuals[i] == visual)
             return TRUE;
     return FALSE;