avoid gcc warnings about unused macro definitions * lib/readtokens.c (STREQ): Remove unused definition. * lib/xmalloc.c (SIZE_MAX): Likewise. * lib/openat-die.c (N_): Likewise. * lib/mountlist.c (SIZE_MAX): Remove definition. Instead, include <stdint.h>. * lib/readutmp.c: Likewise. * modules/readutmp (Depends-on): Add stdint. * modules/mountlist (Depends-on): Add stdint. * lib/userspec.c (ISDIGIT): Move definition into #if block where used.

#include <stdio.h>
int close_stream (FILE *stream);