[processing] added missing import (fixes #16181)

jef-n · jef-n · commit aba58a27e51b · 2017-02-12T11:24:17.000+01:00
(backported from 84bef5f; followup b003cbe)
diff --git a/python/plugins/processing/algs/grass/GrassAlgorithm.py b/python/plugins/processing/algs/grass/GrassAlgorithm.py
@@ -31,7 +31,7 @@
 import importlib
 import re
 
-from PyQt4.QtCore import QCoreApplication
+from PyQt4.QtCore import QCoreApplication, QUrl
 from PyQt4.QtGui import QIcon
 
 from qgis.core import QgsRasterLayer
