One more place where where ownership must be transferred and it wasn'…

…t - resulting in segfaults on app's exit.

git-svn-id: http://svn.osgeo.org/qgis/trunk@6910 c8812cc2-4d05-0410-92ff-de0c093fc19c

python/gui/qgsmapcanvas.sip

@@ -47,7 +47,7 @@ class QgsMapCanvas : QGraphicsView
     enum WheelAction { WheelZoom, WheelZoomAndRecenter, WheelNothing };
 
     //! Constructor
-    QgsMapCanvas(QWidget * parent = 0, const char *name = 0);
+    QgsMapCanvas(QWidget * parent /TransferThis/ = 0, const char *name = 0);
 
     //! Destructor
     ~QgsMapCanvas();