Index: damage.c
===================================================================
RCS file: /cvs/xorg/xc/programs/Xserver/miext/damage/damage.c,v
retrieving revision 1.9
diff -u -d -b -w -r1.9 damage.c
--- damage.c    14 Aug 2004 07:12:37 -0000      1.9
+++ damage.c    25 Aug 2004 01:06:52 -0000
@@ -69,6 +69,8 @@
 
 #define pixmapDamage(pPixmap)          damagePixPriv(pPixmap)
 
+static DamagePtr nullDamage = 0;
+
 static DamagePtr *
 getDrawableDamageRef (DrawablePtr pDrawable)
 {
@@ -78,6 +80,9 @@
     {
        ScreenPtr   pScreen = pDrawable->pScreen;
 
+    if (!((WindowPtr)pDrawable)->viewable)
+        return &nullDamage;
+
        pPixmap = 0;
        if (pScreen->GetWindowPixmap)
            pPixmap = (*pScreen->GetWindowPixmap) ((WindowPtr)pDrawable);