added missing conditional compilation test for wxUSE_PROPSHEET

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@11131 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/proplist.h

@@ -46,6 +46,8 @@
 #pragma interface "proplist.h"
 #endif
 
+#if wxUSE_PROPSHEET
+
 #include "wx/prop.h"
 
 #define wxPROP_BUTTON_CLOSE       1
@@ -578,5 +580,8 @@ class WXDLLEXPORT wxListOfStringsListValidator: public wxPropertyListValidator
    void OnEdit(wxProperty *property, wxPropertyListView *view, wxWindow *parentWindow);
 };
 
+#endif
+  // wxUSE_PROPSHEET
+
 #endif
   // _WX_PROPLIST_H_