Fix for ticket 1201, invalid split if line ends in polygon

git-svn-id: http://svn.osgeo.org/qgis/trunk@9490 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: mhugent

src/core/qgsgeometry.cpp

@@ -4882,9 +4882,25 @@ int QgsGeometry::splitPolygonGeometry( GEOSGeometry* splitLine, QList<QgsGeometr
     GEOSGeom_destroy( intersectGeometry );
   }
 
+  bool splitDone = true;
+  int nGeometriesThis = GEOSGetNumGeometries(mGeos); //original number of geometries
+  if(testedGeometries.size() == nGeometriesThis)
+    {
+      splitDone = false;
+    }
+
   mergeGeometriesMultiTypeSplit( testedGeometries );
 
-  if ( testedGeometries.size() > 0 )
+  //no split done, preserve original geometry
+  if(!splitDone)
+    {
+      for(int i = 0; i < testedGeometries.size(); ++i)
+	{
+	  GEOSGeom_destroy(testedGeometries[i]);
+	}
+      return 1;
+    }
+  else if(testedGeometries.size() > 0) //split successfull
   {
     GEOSGeom_destroy( mGeos );
     mGeos = testedGeometries[0];