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 foreach1;
extern(C) int printf(char*, ...);

void main()
{
    static arr = [1,2,3,4,5];

    printf("forward");
    foreach(v;arr) {
        printf(" %d",v);
    }
    printf("\nreverse");
    foreach_reverse(v;arr) {
        printf(" %d",v);
    }
    printf("\n");
}