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 bug60;
extern(C) int printf(char*, ...);

void func(T...)(T t)
{
    foreach(v;t) {
        if (v.length) {
            foreach(i;v) {
                printf("%d\n", i);
            }
        }
    }
}
void main()
{
    auto a = [1,2,3];
    func(a);
}