network/dns_resolver: fix memory leak

'reply' is allocated in Serialize() at line 120, but is not freed.
Pointed out by Clang Static Analyzer.

Change-Id: I9f7e0c5c2dcb976f11230ad8a5ba38d653b23d6d
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5530
Reviewed-by: Fredrik Holmqvist <[email protected]>
Tested-by: Commit checker robot <[email protected]>

src/add-ons/kernel/network/dns_resolver/server/main.cpp

@@ -121,7 +121,9 @@ GetAddrInfo(const char* buffer)
 	freeaddrinfo(ai);
 	if (result != B_OK)
 		return write_port(gReplyPort, MsgError, &result, sizeof(result));
-	return write_port(gReplyPort, MsgReply, reply, totalSize);
+	result = write_port(gReplyPort, MsgReply, reply, totalSize);
+	free(reply);
+	return result;
 }