UPDATED: stop crashes in desktop mode

[Alex Pasadyn <ajp@mail.utexas.edu>]

Updated to change error reporting...  new file attached...

Alex Pasadyn wrote:
> Greetings all,
> On my system, I get a lot of crashes when using the Wine desktop mode, 
> especially if I try to run more than one application at a time.  For 
> example, starting two Notepads crashes for me with a BadMatch X error. 
> Upon examination, that happens because the CWSibling flag is used in 
> XConfigureWindow for two windows that aren't siblings.
>
> This patch just puts in a simple check that traps this condition so Wine 
> doesn't crash.  I don't know enough about what that code is supposed to 
> be doing to fix it properly.  (This is certainly better enough on my 
> system though as it longer crashes!)  If someone wants to describe what 
> "should" happen there I can look into really fixing it.
>
> -ajp
>
> ChangeLog:
> - Trap a condition that caused X errors in Wine desktop mode
Index: dlls/x11drv/window.c
===================================================================
RCS file: /home/wine/wine/dlls/x11drv/window.c,v
retrieving revision 1.57
diff -u -r1.57 window.c
--- dlls/x11drv/window.c	5 Sep 2003 23:08:26 -0000	1.57
+++ dlls/x11drv/window.c	29 Sep 2003 19:00:03 -0000
@@ -589,7 +589,29 @@
             XReconfigureWMWindow( display, data->whole_window,
                                   DefaultScreen(display), mask, &changes );
         }
-        else XConfigureWindow( display, data->whole_window, mask, &changes );
+        else 
+        {
+            if (mask&CWSibling)
+            {
+                /* make sure windows really are siblings */
+                Window root_ret, parent_ret, parent2_ret, *children_ret;
+                unsigned int nchildren_ret;
+                children_ret=NULL;
+                XQueryTree(display, data->whole_window, &root_ret, 
+                           &parent_ret, &children_ret, &nchildren_ret);
+                if (nchildren_ret) XFree(children_ret);
+                children_ret=NULL;
+                XQueryTree(display, changes.sibling, &root_ret, 
+                           &parent2_ret, &children_ret, &nchildren_ret);
+                if (nchildren_ret) XFree(children_ret);
+                if (parent_ret != parent2_ret)
+                {
+                    ERR("CWSibling specified, but parents (%lx and %lx) differ -> ignoring\n", parent_ret, parent2_ret);
+                    mask &= ~CWSibling;
+                }
+            }
+            XConfigureWindow( display, data->whole_window, mask, &changes );
+        }
         wine_tsx11_unlock();
     }
     return mask;