call GTKUpdateCursor() from SetCursor()

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@40951 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/window.h

@@ -353,7 +353,7 @@ protected:
 
     // set the current cursor for all GdkWindows making part of this widget
     // (see GTKGetWindow)
-public:
+    //
     // should be called from OnInternalIdle() if it's overridden
     void GTKUpdateCursor();