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 mini.norun_debug11;

class C
{
}

class D : C
{
    int i = 42;
}

class E : D
{
    float fp = 3.14f;
}

class F : E
{
    F f;
}

void main()
{
    auto c = new C;
    auto d = new D;
    auto e = new E;
    auto f = new F;

    auto ci = c.classinfo;

    int* fail = cast(int*) 1;
    *fail = 0;
}