Null dynamic arrays could be considered valid

[ske2004]

Like in go, null slices are considered valid, of length zero.

	var s []int
	fmt.Println(s, len(s), cap(s))
	for i := range s { // no error 
		fmt.Println("%d", i)
	}

When writing UI code, I often rely on zero initialization, and if I forget to initialize the empty slices, I get an error if I try to insert something or iterate it. It would be nice to have the slices initialize automatically out of convenience's sake. I'm open for discussing this