add wxTE_PROCESS_ENTER to the list of supported flags (closes #8865) [backport of r51036 from trunk]

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@56715 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/xrc/xh_combo.cpp

@@ -22,6 +22,7 @@
 #ifndef WX_PRECOMP
     #include "wx/intl.h"
     #include "wx/combobox.h"
+    #include "wx/textctrl.h" // for wxTE_PROCESS_ENTER
 #endif
 
 IMPLEMENT_DYNAMIC_CLASS(wxComboBoxXmlHandler, wxXmlResourceHandler)
@@ -34,6 +35,7 @@ wxComboBoxXmlHandler::wxComboBoxXmlHandler()
     XRC_ADD_STYLE(wxCB_SORT);
     XRC_ADD_STYLE(wxCB_READONLY);
     XRC_ADD_STYLE(wxCB_DROPDOWN);
+    XRC_ADD_STYLE(wxTE_PROCESS_ENTER);
     AddWindowStyles();
 }