Allow using wxALIGN_CENTER in XRC for wxStaticText.

Only wxALIGN_CENTRE was allowed previously in the XRC, while both worked in
the code and also even in XRC but for wxSizer alignment.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76695 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/xrc/xh_sttxt.cpp

@@ -30,6 +30,7 @@ wxStaticTextXmlHandler::wxStaticTextXmlHandler()
     XRC_ADD_STYLE(wxST_NO_AUTORESIZE);
     XRC_ADD_STYLE(wxALIGN_LEFT);
     XRC_ADD_STYLE(wxALIGN_RIGHT);
+    XRC_ADD_STYLE(wxALIGN_CENTER);
     XRC_ADD_STYLE(wxALIGN_CENTRE);
     AddWindowStyles();
 }