Fix LTO ICE introduced by ggc_collect patch

[Andrew Pinski]

On Wed, Sep 8, 2010 at 5:05 PM, Jan Hubicka <hubicka@ucw.cz> wrote:
> -  free(decl_data);
> +  ggc_free(decl_data);
> +  real_file_decl_data = NULL;

Should you zero real_file_count also (well maybe -1).

Thanks,
Andrew Pinski