added missing headers (patch 1774617)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@48087 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/xrc/xh_propdlg.cpp

@@ -22,10 +22,12 @@
 #ifndef WX_PRECOMP
     #include "wx/log.h"
     #include "wx/sizer.h"
+    #include "wx/frame.h"
 #endif
 
 #include "wx/bookctrl.h"
 #include "wx/propdlg.h"
+#include "wx/imaglist.h"
 
 IMPLEMENT_DYNAMIC_CLASS(wxPropertySheetDialogXmlHandler, wxXmlResourceHandler)