fix bug where tooltip notifications could generate spin events

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_2_BRANCH@7518 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/spinbutt.cpp

@@ -221,6 +221,9 @@ bool wxSpinButton::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
     LPNMUPDOWN lpnmud = (LPNMUPDOWN)lParam;
 #endif
 
+    if (lpnmud->hdr.hwndFrom != GetHwnd()) // make sure it is the right control
+        return FALSE;
+
     wxSpinEvent event(lpnmud->iDelta > 0 ? wxEVT_SCROLL_LINEUP
                                          : wxEVT_SCROLL_LINEDOWN,
                       m_windowId);