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 bug3;

struct S
{
    int[] arr;
    char[5] ch;
}

class C
{
    int[] arr;
    char[4] crs;
}

void main()
{
    S s;
    s.arr = new int[5];
    s.arr[1] = 32;
    int i;
    i = s.arr[0];
    //assert(s.arr[0] == 0);
    //assert(s.arr[1] == 32);
}