From 1e3bec1495df3fcb04c66f82d4d091da07550f0c Mon Sep 17 00:00:00 2001
From: Stefan Neis <Stefan.Neis@t-online.de>
Date: Sun, 2 May 2004 16:48:22 +0000
Subject: [PATCH] Don't choke on NULL pointer passed into wxSlider::GetSize.
 Take the inverted coordinate system into account when computing size.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@27066 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 src/os2/slider.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/os2/slider.cpp b/src/os2/slider.cpp
index 0a6eb8f985..312d9743c9 100644
--- a/src/os2/slider.cpp
+++ b/src/os2/slider.cpp
@@ -863,8 +863,10 @@ void wxSlider::GetSize(
         wxFindMaxSize( m_hStaticValue
                       ,&vRect
                      );
-    *pnWidth  = vRect.xRight - vRect.xLeft;
-    *pnHeight = vRect.yBottom - vRect.yTop;
+    if (pnWidth)
+        *pnWidth  = vRect.xRight - vRect.xLeft;
+    if (pnHeight)
+        *pnHeight = vRect.yTop - vRect.yBottom;
 } // end of wxSlider::GetSize
 
 int wxSlider::GetThumbLength() const