listbox: scrolling corruption fix

[Huw D M Davies]

        Huw Davies <huw at codeweavers.com>
        Invalidate the focused item when scrolling horizontally so
        that it repaints correctly. 
-- 
Huw Davies
huw at codeweavers.com
Index: controls/listbox.c
===================================================================
RCS file: /home/wine/wine/controls/listbox.c,v
retrieving revision 1.99
diff -u -r1.99 listbox.c
--- controls/listbox.c	10 Dec 2003 04:14:35 -0000	1.99
+++ controls/listbox.c	16 Mar 2004 13:48:57 -0000
@@ -1210,8 +1210,14 @@
     descr->horz_pos = pos;
     LISTBOX_UpdateScroll( hwnd, descr );
     if (abs(diff) < descr->width)
+    {
+        RECT rect;
+        /* Invalidate the focused item so it will be repainted correctly */
+        if (LISTBOX_GetItemRect( descr, descr->focus_item, &rect ) == 1)
+            InvalidateRect( hwnd, &rect, TRUE );
         ScrollWindowEx( hwnd, diff, 0, NULL, NULL, 0, NULL,
                           SW_INVALIDATE | SW_ERASE | SW_SCROLLCHILDREN );
+    }
     else
         InvalidateRect( hwnd, NULL, TRUE );
 }