[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.

class Foo
{
    int i;
}

class Bar : Foo
{
    int j;
}

void func()
{
    scope c = new Bar;
    func2(c);
}

void func2(Bar c)
{
    c.i = 123;
}

void main()
{
    func();
}