Fixes for include guards, patch 1256967 Paul Cornett

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@35698 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/cocoa/tooltip.h

@@ -9,6 +9,9 @@
 // Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
 
+#ifndef _WX_COCOA_TOOLTIP_H_
+#define _WX_COCOA_TOOLTIP_H_
+
 #include "wx/object.h"
 
 class wxWindow;
@@ -43,4 +46,6 @@ private:
     wxWindow *m_window;         // window we're associated with
     
     DECLARE_ABSTRACT_CLASS(wxToolTip)
-};
+};
+
+#endif // _WX_COCOA_TOOLTIP_H_