compilation fix

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@11303 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/generic/splitter.h

@@ -17,6 +17,7 @@
 #endif
 
 #include "wx/window.h"                      // base class declaration
+#include "wx/containr.h"                    // wxControlContainer
 
 class WXDLLEXPORT wxSplitterEvent;
 
@@ -37,8 +38,6 @@ enum
     wxSPLIT_DRAG_LEFT_DOWN
 };
 
-class WXDLLEXPORT wxControlContainer;
-
 // ---------------------------------------------------------------------------
 // wxSplitterWindow maintains one or two panes, with
 // an optional vertical or horizontal split which