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).

void main()
{
  static int[] b = [1, 2];
  b[0] = 2;
  
  typedef int[] ia = [1,2];
  static ia a;
  a[0] = 5;
}