Return a new C string initialized of length

Property definitions

nitc $ NaiveInterpreter :: c_string_instance_len
	# Return a new C string initialized of `length`
	fun c_string_instance_len(length: Int): PrimitiveInstance[CString]
	do
		var val = new CString(length)

		var t = mainmodule.c_string_type
		var instance = new PrimitiveInstance[CString](t, val)
		init_instance_primitive(instance)
		return instance
	end
src/interpreter/naive_interpreter.nit:368,2--377,4