window.patch

diff --git a/RenderSystems/GL/src/OSX/OgreOSXCocoaWindow.mm b/RenderSystems/GL/src/OSX/OgreOSXCocoaWindow.mm
index 3956f21..47e41f0 100644
--- a/RenderSystems/GL/src/OSX/OgreOSXCocoaWindow.mm
+++ b/RenderSystems/GL/src/OSX/OgreOSXCocoaWindow.mm
@@ -290,6 +290,7 @@ namespace Ogre {
             }
 
             mWindow = [mView window];
+            [mWindow retain];
 
             // Add our window to the window event listener class
             WindowEventUtilities::_addRenderWindow(this);