fix #1 for message queue migration

[eric pouech]

I think this is the proper fix now... (see wine devel for the details)

A+
-- 
---------------
Eric Pouech (http://perso.wanadoo.fr/eric.pouech/)
"The future will be better tomorrow", Vice President Dan Quayle
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Name: mqs1
ChangeLog: fixed a bit the queue management since moved to the server
GenDate: 2001/05/19 14:13:44 UTC
ModifiedFiles: windows/winpos.c
AddedFiles: 
===================================================================
RCS file: /usr/share/cvs/cvsroot/wine/wine/windows/winpos.c,v
retrieving revision 1.99
diff -u -u -r1.99 winpos.c
--- windows/winpos.c	2001/05/16 19:52:31	1.99
+++ windows/winpos.c	2001/05/19 14:07:40
@@ -2150,6 +2150,25 @@
                           INT x, INT y, INT cx, INT cy, UINT flags )
 {
     WINDOWPOS winpos;
+    WND *wndPtr = WIN_FindWndPtr(hwnd);
+
+    if (wndPtr)
+    {
+	/* if window is about to be hidden, then we must clear any pending pending paint
+	 * operation and information
+	 * Those will be restored when window is displayed again
+	 */
+        if ((wndPtr->dwStyle & WS_VISIBLE) && 
+	     (flags & SWP_HIDEWINDOW) &&
+	    ((wndPtr->flags & WIN_INTERNAL_PAINT) || wndPtr->hrgnUpdate))
+	{
+	     if (wndPtr->hrgnUpdate) DeleteObject(wndPtr->hrgnUpdate);
+	     wndPtr->hrgnUpdate = 0;
+	     wndPtr->flags &= ~WIN_INTERNAL_PAINT;
+	     QUEUE_DecPaintCount(wndPtr->hmemTaskQ);
+	}
+	WIN_ReleaseWndPtr(wndPtr);
+    }
 
     winpos.hwnd = hwnd;
     winpos.hwndInsertAfter = hwndInsertAfter;