X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/644231539d2ccf9ef873060154079f33ba7a42db..56acdfef2f2759bbc03c2fab5f7da25f6ca6d563:/src/x11/region.cpp

diff --git a/src/x11/region.cpp b/src/x11/region.cpp
index 1f7f4d5929..0b5130d9be 100644
--- a/src/x11/region.cpp
+++ b/src/x11/region.cpp
@@ -149,6 +149,12 @@ void wxRegion::Clear()
 
 bool wxRegion::Union( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 {
+    // work around for XUnionRectWithRegion() bug: taking a union with an empty
+    // rect results in an empty region (at least XFree 3.3.6 and 4.0 have this
+    // problem)
+    if ( !width || !height )
+        return TRUE;
+
     XRectangle rect;
     rect.x = x;
     rect.y = y;