Add DCX_CLIPSIBLINGS to flags for DCE_GetVisRgn only if window has WS_CLIPSIBLINGS bit set

[Dmitry Timoshkov]

Hello.

This patch removes my old SetWindowPos patch and replaces it
by the really correct one. Thanks to Gerard Patel for providing
test application and pointing out to the real problem.

Changelog:
    Dmitry Timoshkov <dmitry at codeweavers.com>
    Add DCX_CLIPSIBLINGS to flags for DCE_GetVisRgn only if window
    has WS_CLIPSIBLINGS bit set.

--- cvs/wine/windows/winpos.c	Sat Mar  3 12:39:58 2001
+++ wine/windows/winpos.c	Sat Mar  3 13:38:23 2001
@@ -2244,6 +2244,7 @@
  RECT r;
  HRGN newVisRgn, dirtyRgn;
  INT  my = COMPLEXREGION;
+ DWORD dflags;
 
  TRACE("\tnew wnd=(%i %i-%i %i) old wnd=(%i %i-%i %i), %04x\n",
 	      Wnd->rectWindow.left, Wnd->rectWindow.top,
@@ -2259,7 +2260,11 @@
  if( Wnd->hrgnUpdate == 1 )
      uFlags |= SWP_EX_NOCOPY; /* whole window is invalid, nothing to copy */
 
- newVisRgn = DCE_GetVisRgn( Wnd->hwndSelf, DCX_WINDOW | DCX_CLIPSIBLINGS, 0, 0);
+ dflags = DCX_WINDOW;
+ if(Wnd->dwStyle & WS_CLIPSIBLINGS)
+     dflags |= DCX_CLIPSIBLINGS;
+ newVisRgn = DCE_GetVisRgn( Wnd->hwndSelf, dflags, 0, 0);
+
  dirtyRgn = CreateRectRgn( 0, 0, 0, 0 );
 
  if( !(uFlags & SWP_EX_NOCOPY) ) /* make sure dst region covers only valid bits */
@@ -2898,13 +2903,8 @@
 		else
 		{
 		    if( (winpos.flags & SWP_AGG_NOPOSCHANGE) != SWP_AGG_NOPOSCHANGE )
-		    {
-			/* if window was not resized and not moved try to repaint itself */
-			if((winpos.flags & SWP_AGG_NOGEOMETRYCHANGE) == SWP_AGG_NOGEOMETRYCHANGE)
-			    uFlags |= SWP_EX_PAINTSELF;
 		         uFlags = SWP_CopyValidBits(wndPtr, &visRgn, &oldWindowRect, 
 							    &oldClientRect, uFlags);
-		    }
 	            else
 		    {
 			/* nothing moved, redraw frame if needed */