In PostScript and PDF output, one AFM unit is not nearly enough

inter-word spacing, let's try again with 250 AFM units.
Regression caused during my recent term_flushln() reorg in rev. 1.278,
reported by brynet@ (sorry and many thanks for reporting).

1 files changed, 4 insertions, 3 deletions

diff --git a/term.c b/term.c
index 76fdeab0..8e976228 100644
--- a/term.c
+++ b/term.c
@@ -1,4 +1,4 @@
-/*	$Id: term.c,v 1.279 2019/01/04 03:21:02 schwarze Exp $ */
+/*	$Id: term.c,v 1.280 2019/01/15 12:16:18 schwarze Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010-2019 Ingo Schwarze <schwarze@openbsd.org>
@@ -374,8 +374,9 @@ term_field(struct termp *p, size_t vbl, size_t nbr, size_t vbr, size_t vtarget)
 			continue;
 		case ' ':
 		case ASCII_NBRSP:
-			vbl++;
-			vis++;
+			dv = (*p->width)(p, ' ');
+			vbl += dv;
+			vis += dv;
 			continue;
 		default:
 			break;