[lotest] Fix endianness in status message

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/usr/lotest.c

 			}
 		} else {
 			printf ( "\nReceived spurious packet type %04x\n",
-				 net_proto );
+				 ntohs ( net_proto ) );
 			/* Continue; this allows for the fact that
 			 * there may have been packets outstanding on
 			 * the wire when we started the test.