Ignored error when we cannot save our modified tuning space.

It seems to work just fine and fix an error in windows 7 (it was
refused unless VLC wass run with admin rights).

modules/access/bda/bdagraph.cpp

@@ -1188,8 +1188,7 @@ HRESULT BDAGraph::Build()
     if( FAILED( hr ) )
     {
         msg_Warn( p_access, "Build: "\
-            "Cannot save Tuning Space: hr=0x%8lx", hr );
-        return hr;
+            "Cannot save Tuning Space: hr=0x%8lx (ignored)", hr );
     }
 
     /* If we have already have a filter graph, rebuild it*/