How to check whether an empty array variable is null?

[tcak via Digitalmars-d-learn]

[code]
        int[] list;

        list = new int[0];
        std.stdio.writeln("Is Null ? ", (list is null));
[/code]

Result is "Is Null? true".

Is this the correct behaviour? I would expect compiler to point 
to an address in the heap, but set the length as 0. So, it 
wouldn't return null, but the length would be 0 only.