Forbid dynamic arrays in boolean evaluation contexts

[Jonathan M Davis]

On Monday, March 25, 2013 13:32:36 Jonathan M Davis wrote:
> However, the problem here is that cast(bool)arr returns whether
> arr.ptr is null rather than arr.length == 0, which is inconsistent with
> almost everything else that goes on with arrays, and so it's error-prone.

Actually, that should be that returns whether arr !s null rather than 
arr.length != 0, but you get the idea.

- Jonathan M Davis