[Bug 3738] Loading and unloading builtin OpenGL.DLL leads to crash

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=3738

------- Additional Comments From [e-mail]  2005-02-11 13:07 -------
Got it.  That's a "DesktopDoubleBuffered" registry value from a default X11Drv
config key.  If I set it to 'Y', exception disappears.

Reversing patch [1] helps me too.  If I change code this way:

--- dlls/x11drv/x11drv_main.c   23 Sep 2005 17:21:32 -0000      1.112
+++ dlls/x11drv/x11drv_main.c   2 Nov 2005 19:04:33 -0000
@@ -406,11 +406,11 @@ static BOOL process_attach(void)
         }
     }
     if (!screen_depth) screen_depth = DefaultDepthOfScreen( screen );

/* If OpenGL is available, change the default visual, etc as necessary */
-    if (desktop_dbl_buf && (desktop_vi = X11DRV_setup_opengl_visual( display )))
+    if ((desktop_vi = X11DRV_setup_opengl_visual( display )))
     {
         visual       = desktop_vi->visual;
         screen       = ScreenOfDisplay(display, desktop_vi->screen);
         screen_depth = desktop_vi->depth;
     }

exception is gone too.  Something is getting not initialized in the file or
initialized at wrong time, I guess.

[1] http://www.winehq.org/pipermail/wine-cvs/2005-June/016508.html