added InitCommandEventWithItems() and call it from wxChoice and wxComboBox code to ensure that per item client data is set correctly in the generated events (replaces patch 1476171; closes bug 1470505)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@39064 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/choice.cpp

@@ -741,10 +741,7 @@ bool wxChoice::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
                 if ( n > -1 )
                 {
                     event.SetString(GetStringSelection());
-                    if ( HasClientObjectData() )
-                        event.SetClientObject( GetClientObject(n) );
-                    else if ( HasClientUntypedData() )
-                        event.SetClientData( GetClientData(n) );
+                    InitCommandEventWithItems(event, n);
                 }
 
                 ProcessCommand(event);