-Werror,-Wtautological-undefined-compare

("reference cannot be bound to dereferenced null pointer in well-defined C++
code; comparison may be assumed to always evaluate to true")

Change-Id: I78498b6be6cf3f6f15a80187c9a24dfcdd91d3be

sfx2/source/dialog/taskpane.cxx

@@ -975,7 +975,7 @@ namespace sfx2
 
     IMPL_LINK( TaskPaneController_Impl, DockingChanged, TitledDockingWindow*, i_pDockingWindow )
     {
-        ENSURE_OR_RETURN( i_pDockingWindow && &m_rDockingWindow, "TaskPaneController_Impl::DockingChanged: where does this come from?", 0L );
+        ENSURE_OR_RETURN( i_pDockingWindow, "TaskPaneController_Impl::DockingChanged: where does this come from?", 0L );
 
         if ( impl_getLayout() == LAYOUT_DRAWERS )
             return 0L;