don't call OnData() if OnEnter() rejected the drag (#9634)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@54398 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/ole/droptgt.cpp

@@ -244,6 +244,7 @@ STDMETHODIMP wxIDropTarget::DragOver(DWORD   grfKeyState,
         result = wxDragNone;
     }
 
+    if ( result != wxDragNone ) {
         // we need client coordinates to pass to wxWin functions
         if ( !ScreenToClient(m_hwnd, (POINT *)&pt) )
         {
@@ -253,6 +254,10 @@ STDMETHODIMP wxIDropTarget::DragOver(DWORD   grfKeyState,
         *pdwEffect = ConvertDragResultToEffect(
                         m_pTarget->OnDragOver(pt.x, pt.y, result)
                      );
+    }
+    else {
+        *pdwEffect = DROPEFFECT_NONE;
+    }
 
     return S_OK;
 }