fix a bug

db_transfer.py

@@ -49,7 +49,7 @@ class DbTransfer(object):
 				query_sub_in = '%s' % id
 
 		if query_sub_when == '':
-			return
+			return update_transfer
 		query_sql = query_head + ' SET u = CASE port' + query_sub_when + \
 					' END, d = CASE port' + query_sub_when2 + \
 					' END, t = ' + str(int(last_time)) + \
@@ -61,6 +61,7 @@ class DbTransfer(object):
 		cur.close()
 		conn.commit()
 		conn.close()
+		return update_transfer
 
 	def push_db_all_user(self):
 		#更新用户流量到数据库