From de66b772294e314828d85cb9cdd5db82221f317a Mon Sep 17 00:00:00 2001
From: Miikka Heikkinen <miikka.heikkinen@digia.com>
Date: Tue, 9 Mar 2010 15:02:25 +0200
Subject: Added check for null pointer in qt_vg_unregister_pixmap.

The method qt_vg_unregister_pixmap is sometimes called when the
QVGSharedContext is already destroyed. Do not try to access it
if it is null.

Part of QtP delta reduction effort.

Reviewed-by: Jason Barron
---
 src/openvg/qwindowsurface_vgegl.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/openvg/qwindowsurface_vgegl.cpp b/src/openvg/qwindowsurface_vgegl.cpp
index 9c44545..693312a 100644
--- a/src/openvg/qwindowsurface_vgegl.cpp
+++ b/src/openvg/qwindowsurface_vgegl.cpp
@@ -177,7 +177,8 @@ void qt_vg_unregister_pixmap(QVGPixmapData *pd)
         pd->prev->next = pd->next;
     } else {
         QVGSharedContext *shared = sharedContext();
-        shared->firstPixmap = pd->next;
+        if (shared)
+           shared->firstPixmap = pd->next;
     }
 }
 
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