Send layerWillBeRemoved signal for each layer in QgsMapLayerRegistry::removeAllMapLayers()

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@9743 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: mhugent

src/core/qgsmaplayerregistry.cpp

@@ -111,6 +111,7 @@ void QgsMapLayerRegistry::removeAllMapLayers()
   QMap<QString, QgsMapLayer *>::iterator it;
   for ( it = mMapLayers.begin(); it != mMapLayers.end() ; ++it )
   {
+    emit layerWillBeRemoved( it.key() );
     delete it.value(); // delete the map layer
   }
   mMapLayers.clear();