fix NULL pointer assigment.

stopa85 · stopa85 · commit fb872c346c1d · 2011-01-31T06:48:49.000Z
git-svn-id: http://svn.osgeo.org/qgis/trunk@15109 c8812cc2-4d05-0410-92ff-de0c093fc19c
diff --git a/src/plugins/roadgraph/shortestpathwidget.cpp b/src/plugins/roadgraph/shortestpathwidget.cpp
@@ -227,6 +227,11 @@ bool RgShortestPathWidget::getPath( AdjacencyMatrix& matrix, QgsPoint& p1, QgsPo
   builder.setDestinationCrs( mPlugin->iface()->mapCanvas()->mapRenderer()->destinationSrs() );
   {
     const RgGraphDirector *director = mPlugin->director();
+    if ( director == NULL )
+    {
+      QMessageBox::critical( this, tr( "Plugin isn't configured" ), tr( "Plugin isn't configured!" ) );
+      return false;
+    }
     director->makeGraph( &builder );
 
     // not need
