From 8f634d6b940d5ebd92fa1a951fcf04ed2d2c433b Mon Sep 17 00:00:00 2001
From: Timotej Lazar <timotej.lazar@fri.uni-lj.si>
Date: Tue, 9 Aug 2016 14:50:00 +0200
Subject: Add a missing import to prolog/common.py

---
 prolog/common.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/prolog/common.py b/prolog/common.py
index 8e3d91d..e591e0b 100644
--- a/prolog/common.py
+++ b/prolog/common.py
@@ -1,4 +1,6 @@
 import operator
+import socket
+
 import prolog.engine
 from prolog.util import tokenize
 from server.hints import Hint, HintPopup
@@ -22,6 +24,7 @@ hint_type = {
 
 # Check program for syntax errors.
 def check_syntax(code, aux_code):
+    engine_id = None
     try:
         engine_id, output = prolog.engine.create(code=code+aux_code, timeout=1.0)
         if 'error' in map(operator.itemgetter(0), output):
-- 
cgit v1.2.1