From 2f5c0ee0a9ffc6619ba35ed120e023283fdb1a88 Mon Sep 17 00:00:00 2001
From: jimtabor <james.tabor@reactos.org>
Date: Sun, 31 Mar 2019 13:31:59 -0500
Subject: [PATCH] [NtGdi] Fix assert with Winamp

Fixes CORE-10774.

Reference:
Alexandre Julliard : Ignore empty rectangles in ExtCreateRegion.
https://source.winehq.org/git/wine.git/commitdiff/8ac61c5a1e56d0933de8af69dbb2a1640d13e05d
---
 win32ss/gdi/ntgdi/region.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/win32ss/gdi/ntgdi/region.c b/win32ss/gdi/ntgdi/region.c
index 13fae9efd15..79712182c71 100644
--- a/win32ss/gdi/ntgdi/region.c
+++ b/win32ss/gdi/ntgdi/region.c
@@ -3858,7 +3858,10 @@ NtGdiExtCreateRegion(
         /* Insert the rectangles one by one */
         for(i=0; i<nCount; i++)
         {
-            REGION_UnionRectWithRgn(Region, &rects[i]);
+            if ( rects[i].left < rects[i].right && rects[i].top < rects[i].bottom )
+            {
+                REGION_UnionRectWithRgn(Region, &rects[i]);
+            }
         }
 
         if (Xform != NULL)