Fixed #3681

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@15620 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: wonder

src/core/symbology-ng/qgscategorizedsymbolrendererv2.cpp

@@ -138,6 +138,8 @@ QgsSymbolV2* QgsCategorizedSymbolRendererV2::symbolForFeature( QgsFeature& featu
 
   // find the right symbol for the category
   QgsSymbolV2* symbol = symbolForValue( *ita );
+  if ( symbol == NULL )
+    return NULL;
 
   if ( mRotationFieldIdx == -1 && mSizeScaleFieldIdx == -1 )
     return symbol; // no data-defined rotation/scaling - just return the symbol

src/core/symbology-ng/qgsgraduatedsymbolrendererv2.cpp

@@ -137,7 +137,8 @@ QgsSymbolV2* QgsGraduatedSymbolRendererV2::symbolForFeature( QgsFeature& feature
 
   // find the right category
   QgsSymbolV2* symbol = symbolForValue( ita->toDouble() );
-
+  if ( symbol == NULL )
+    return NULL;
 
   if ( mRotationFieldIdx == -1 && mSizeScaleFieldIdx == -1 )
     return symbol; // no data-defined rotation/scaling - just return the symbol