mescc: Remove last hardcodings for identifiers.

mescc: Remove last hardcodings for identifiers.

* module/language/c99/compiler.mes (ident->accu, ident->base):
  Use local:ptr, type->size to remove hard coding of functionx, c1.
  (expr->accu): Use type->size to remove hard coding of size byte.
  (decl->type): Also handle typename, bail out if type not found.
  (type->size): Print identifier and and bail out if type not found.
  (formal:ptr): New function.
  (formals->locals): Use it to set pointer value of parameter.  WAS: 0.
  (ast->info): Remove functionx hardcoding.
  (getchar): Rename c1 to c.
* doc/examples/t.c: Test it.