Fix memory leak when setting v5 properties in mosquitto_connect_v5()

ChangeLog.txt

@@ -23,6 +23,7 @@ Client library:
 - on_connect callback is now called with the correct v5 reason code if a v5
   client connects to a v3.x broker and is sent a CONNACK with the
   "unacceptable protocol version" connack reason code.
+- Fix memory leak when setting v5 properties in mosquitto_connect_v5().
 
 Clients:
 - mosquitto_pub: fix error codes not being returned when mosquitto_pub exits.

lib/send_connect.c

@@ -168,6 +168,7 @@ int send__connect(struct mosquitto *mosq, uint16_t keepalive, bool clean_session
 		property__write_all(packet, properties, false);
 		property__write_all(packet, local_props, false);
 	}
+	mosquitto_property_free_all(&local_props);
 
 	/* Payload */
 	if(clientid){