coverity#707601 Uninitialized pointer field

Change-Id: I1b7c13be91bd2047a4141b6d7d8e4363b0ddcf4f
Reviewed-on: https://gerrit.libreoffice.org/2211Tested-by: Caolán McNamara <caolanm@redhat.com>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>

accessibility/source/standard/vclxaccessiblemenubar.cxx

@@ -45,6 +45,10 @@ VCLXAccessibleMenuBar::VCLXAccessibleMenuBar( Menu* pMenu )
         if ( m_pWindow )
             m_pWindow->AddEventListener( LINK( this, VCLXAccessibleMenuBar, WindowEventListener ) );
     }
+    else
+    {
+        m_pWindow = 0;
+    }
 }
 
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