Merge pull request #1460 from rouault/fix_crash_in_QgsVectorFileWriter_addFeature

Fix crash in QgsVectorFileWriter::addFeature()

src/core/qgsvectorfilewriter.cpp

@@ -1548,6 +1548,8 @@ bool QgsVectorFileWriter::addFeature( QgsFeature& feature, QgsFeatureRendererV2*
 {
   // create the feature
   OGRFeatureH poFeature = createFeature( feature );
+  if( !poFeature )
+      return false;
 
   //add OGR feature style type
   if ( mSymbologyExport != NoSymbology && renderer )