From 9a1fddb0fd8f0d5c2c8601a9eadfe7737598c007 Mon Sep 17 00:00:00 2001
From: Henri Verbeet <hverbeet@codeweavers.com>
Date: Wed, 10 Nov 2010 10:53:03 +0100
Subject: [PATCH] wined3d: Register a window only once.

---
 dlls/wined3d/wined3d_main.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/dlls/wined3d/wined3d_main.c b/dlls/wined3d/wined3d_main.c
index 0932351e2ad..0e4470274d9 100644
--- a/dlls/wined3d/wined3d_main.c
+++ b/dlls/wined3d/wined3d_main.c
@@ -422,6 +422,13 @@ BOOL wined3d_register_window(HWND window, IWineD3DDeviceImpl *device)
 
     wined3d_mutex_lock();
 
+    if (wined3d_find_wndproc(window))
+    {
+        wined3d_mutex_unlock();
+        WARN("Window %p is already registered with wined3d.\n", window);
+        return TRUE;
+    }
+
     if (wndproc_table.size == wndproc_table.count)
     {
         unsigned int new_size = max(1, wndproc_table.size * 2);