Remove Bug when aborting to save config

KCG/base/kcg.py

@@ -314,7 +314,7 @@ class Gui(QtGui.QMainWindow):
         filenameDialog.setAcceptMode(filenameDialog.AcceptSave)
         filenameDialog.exec_()
         filename = filenameDialog.selectedFiles()
-        if not filename[0]:
+        if not filename:
             return
 
         if board_id is None: