From ab6e65507dec1c3654c987ec19530b69c6a92a0a Mon Sep 17 00:00:00 2001
From: Mark Pizzolato <mark@infocomm.com>
Date: Sun, 6 Nov 2022 13:01:11 -1000
Subject: [PATCH] SCP: Allow MTAB show routines to cleanly output nothing and
 be well formatted

Merely returning a non SCPE_OK status indicates no output and thus no
comma or newline separation.
---
 scp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scp.c b/scp.c
index 9cf8ce66..e71fe1bb 100644
--- a/scp.c
+++ b/scp.c
@@ -7390,9 +7390,9 @@ for (mptr = dptr->modifiers; mptr->mask != 0; mptr++) {
         ((mptr->mask & MTAB_XTD)?
             (MODMASK(mptr,flag) && !MODMASK(mptr,MTAB_NMO)): 
             ((MTAB_VUN == (uint32)flag) && ((uptr->flags & mptr->mask) == mptr->match)))) {
-        if (*toks > 2) {
+        if ((*toks > 2) && (r == SCPE_OK)) {/* something emitted already? */
             fprintf (st, "\n");
-            *toks = 0;
+            *toks = 0;                      /* force device/unit name indent on next output */
             }
         if (r == SCPE_OK)
             fprint_sep (st, toks, flag);