fix: Road graph plugin crash qgis when use spatelite as source layer

stopa85 · stopa85 · commit 55d0c2874f3a · 2011-01-31T10:46:46.000Z
git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@15110 c8812cc2-4d05-0410-92ff-de0c093fc19c
diff --git a/src/plugins/roadgraph/linevectorlayerdirector.cpp b/src/plugins/roadgraph/linevectorlayerdirector.cpp
@@ -70,8 +70,14 @@ void RgLineVectorLayerDirector::makeGraph( RgGraphBuilder *builder ) const
 
   builder->setSourceCrs( vl->crs() );
   QgsAttributeList la;
-  la.push_back( mDirectionFieldId );
-  la.push_back( mSpeedFieldId );
+  if ( mDirectionFieldId != -1 )
+  {
+    la.push_back( mDirectionFieldId );
+  }
+  if ( mSpeedFieldId != -1 )
+  {
+    la.push_back( mSpeedFieldId );
+  }
 
   SpeedUnit su = SpeedUnit::byName( mSpeedUnitName );
 
