Fix internal function of wms server

git-svn-id: http://svn.osgeo.org/qgis/trunk@15791 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: mhugent

src/mapserver/qgswmsserver.cpp

@@ -732,8 +732,9 @@ QImage* QgsWMSServer::initializeRendering( QStringList& layersList, QStringList&
   mConfigParser->setScaleDenominator( scaleCalc.calculate( mapExtent, theImage->width() ) );
 
   //create objects for qgis rendering
-  QStringList theLayers = layerSet( layersList, stylesList, mMapRenderer->destinationCrs() );
-  mMapRenderer->setLayerSet( theLayers );
+  layerIdList.clear();
+  layerIdList = layerSet( layersList, stylesList, mMapRenderer->destinationCrs() );
+  mMapRenderer->setLayerSet( layerIdList );
   return theImage;
 }