added wxBU_* styles

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@10402 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

contrib/src/xml/xh_bttn.cpp

@@ -26,6 +26,10 @@
 wxButtonXmlHandler::wxButtonXmlHandler() 
 : wxXmlResourceHandler() 
 {
+    ADD_STYLE(wxBU_LEFT);
+    ADD_STYLE(wxBU_RIGHT);
+    ADD_STYLE(wxBU_TOP);
+    ADD_STYLE(wxBU_BOTTOM);
     AddWindowStyles();
 }