Initialise connection properly at startup

Change-Id: I5640fb14a8bfac06413a50a5ec9a80ce030437b0
diff --git a/ipc/ipc.py b/ipc/ipc.py
index 969953b..5b75270 100644
--- a/ipc/ipc.py
+++ b/ipc/ipc.py
@@ -29,6 +29,7 @@
     def server_init(self, host, port):
         self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
         self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+        self.conn = None
 
         while True:
             try: