Write the header for an application-specific extension of 16 data bytes

After writing the header, clients should write the 16 data bytes.

Property definitions

msgpack :: write $ Writer :: write_msgpack_fixext16
	# Write the header for an application-specific extension of 16 data bytes
	#
	# After writing the header, clients should write the 16 data bytes.
	fun write_msgpack_fixext16(typ: Int)
	do
		write_byte 0xD8
		write_byte typ
	end
lib/msgpack/write.nit:484,2--491,4