Flush pending messages before testing painting message sequences

[Dmitry Timoshkov]

Hello,

in the case a window was created under mouse cursor paint message test
fails because it doesn't expect to see mouse messages in the queue.

Changelog:
    Dmitry Timoshkov <dmitry at codeweavers.com>
    Flush pending messages before testing painting message sequences.

--- cvs/hq/wine/dlls/user/tests/msg.c	2004-10-27 16:35:52.000000000 +0900
+++ wine/dlls/user/tests/msg.c	2004-10-27 19:01:08.000000000 +0900
@@ -2845,6 +2845,9 @@ static void test_paint_messages(void)
     /* now with frame */
     SetRectRgn( hrgn, -5, -5, 20, 20 );
 
+    /* flush pending messages */
+    while (PeekMessage( &msg, 0, 0, 0, PM_REMOVE )) DispatchMessage( &msg );
+
     flush_sequence();
     RedrawWindow( hwnd, NULL, hrgn, RDW_INVALIDATE | RDW_FRAME );
     ok_sequence( WmEmptySeq, "EmptySeq", FALSE );