jp (file): fixed bad quit call

frontends/src/jp/cmd_file.py

@@ -207,7 +207,7 @@ class Receive(base.CommandAnswering):
         self.path = os.path.abspath(self.args.path)
         if not os.path.isdir(self.path):
             self.disp(_(u"Given path is not a directory !", error=True))
-            self.quit(2)
+            self.host.quit(2)
         if self.args.multiple:
             self.host.quit_on_progress_end = False
         self.disp(_(u"waiting for incoming file request"),2)