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 arrays13;

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

void main()
{
    char[] a = "hello";

    assert(a >  "hel");
    assert(a >= "hel");
    assert(a <  "helloo");
    assert(a <= "helloo");
    assert(a >  "betty");
    assert(a >= "betty");
    assert(a == "hello");
    assert(a <= "hello");
    assert(a >= "hello");
}