fix Intersect lines tool

Author: alexbruy

python/plugins/fTools/tools/doIntersectLines.py

@@ -51,8 +51,12 @@ def __init__(self, iface):
 
     def populateLayers( self ):
         layers = ftools_utils.getLayerNames([QGis.Line])
+        QObject.disconnect(self.inLine1, SIGNAL("currentIndexChanged(QString)"), self.update1)
+        QObject.disconnect(self.inLine2, SIGNAL("currentIndexChanged(QString)"), self.update2)
         self.inLine1.clear()
         self.inLine2.clear()
+        QObject.connect(self.inLine1, SIGNAL("currentIndexChanged(QString)"), self.update1)
+        QObject.connect(self.inLine2, SIGNAL("currentIndexChanged(QString)"), self.update2)
         self.inLine1.addItems(layers)
         self.inLine2.addItems(layers)