Don't print the entire declaration of the alliassee when `->toChars()` is called on an `AliasDeclaration`; just printing the name will do. This fixes #305, which otherwise tries to generate {{{ class E { void A() { alias /* recurse into E->toCBuffer() */ m; } } }}} by way of an infinite recursion (causing a segfault when the stack runs out).

module bug54;

extern(C) size_t strlen(char*);

// creating args for main
void d_main_args(size_t n, char** args, ref char[][] res)
{
    assert(res.length == n);
    foreach(i,v; args[0..n])
    {
        res[i] = v[0 .. strlen(v)];
    }
}

void main()
{
}