Raise an exception on empty packets (geoip Python class)

tests/iptogeo.py

@@ -75,11 +75,12 @@ class IPToGeo(object):
         try:
             self._socket.send(packet)
         except IOError, e:
-            # Give another chance (we may have been disconnected due to timeout
+            # Give another chance (we may have been disconnected due to timeout)
             self._create_socket()
             self._socket.send(packet)
         packet = self._socket.recv(IPToGeo.PACKET_SIZE)
-
+        if not packet:
+            raise IPToGeoException('Error, empty packet')
         (ip, country_code) = self._check_request(packet)
         if country_code:
             # convert to string