[src/trunk]: src/bin/sh Unbreak (at least) i386 build .... I have no idea why...

[kre <kre%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/cda1a24dc5dc
branches:  trunk
changeset: 354201:cda1a24dc5dc
user:      kre <kre%NetBSD.org@localhost>
date:      Wed Jun 07 08:06:22 2017 +0000

description:
Unbreak (at least) i386 build .... I have no idea why this built for me on
amd64 (problem was missing prototype for snprintf witout <stdio.h>)

While here, add some (DEBUG mode only) tracing that proved useful in
solving another problem.

diffstat:

 bin/sh/var.c |  7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diffs (38 lines):

diff -r 0d27f2b64364 -r cda1a24dc5dc bin/sh/var.c
--- a/bin/sh/var.c      Wed Jun 07 07:06:26 2017 +0000
+++ b/bin/sh/var.c      Wed Jun 07 08:06:22 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: var.c,v 1.57 2017/06/07 05:08:32 kre Exp $     */
+/*     $NetBSD: var.c,v 1.58 2017/06/07 08:06:22 kre Exp $     */
 
 /*-
  * Copyright (c) 1991, 1993
@@ -37,10 +37,11 @@
 #if 0
 static char sccsid[] = "@(#)var.c      8.3 (Berkeley) 5/4/95";
 #else
-__RCSID("$NetBSD: var.c,v 1.57 2017/06/07 05:08:32 kre Exp $");
+__RCSID("$NetBSD: var.c,v 1.58 2017/06/07 08:06:22 kre Exp $");
 #endif
 #endif /* not lint */
 
+#include <stdio.h>
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
@@ -490,6 +491,7 @@
                        if ((vp->flags & (VEXPORT|VUNSET)) == VEXPORT)
                                nenv++;
        }
+       CTRACE(DBG_VARS, ("environment: %d vars to export\n", nenv));
        ep = env = stalloc((nenv + 1) * sizeof *env);
        for (vpp = vartab ; vpp < vartab + VTABSIZE ; vpp++) {
                for (vp = *vpp ; vp ; vp = vp->next)
@@ -498,6 +500,7 @@
                                        *ep++ = (*vp->rfunc)(vp);
                                else
                                        *ep++ = vp->text;
+                               VTRACE(DBG_VARS, ("environment: %s\n", ep[-1]));
                        }
        }
        *ep = NULL;