[svn r349] Fixed problems with static arrays of void as well as a static arrays with zero length. Fixed issues with DMD generated assert statements when using class invariants, generally due to incomplete ASTs. Removed some dead code. Added a few comments.

module tangotests.nested1;

void main()
{
    int i = 42;
    assert(i == 42);
    void func()
    {
        assert(i == 42);
    }
    func();
}