When a line (in the sense of term_flushln()) contains white space only,

the `vbl' variable includes the left margin, but `vis' does not.
Prevent a `vis' underflow that caused a bogus blank line.
Bug reported by Carsten Kunze, found in less(1): .Bl -tag ... .It " "

1 files changed, 3 insertions, 1 deletions

diff --git a/term.c b/term.c
index 25e0e0fd..42c7a5f8 100644
--- a/term.c
+++ b/term.c
@@ -254,8 +254,10 @@ term_flushln(struct termp *p)
 	 * If there was trailing white space, it was not printed;
 	 * so reset the cursor position accordingly.
 	 */
-	if (vis)
+	if (vis > vbl)
 		vis -= vbl;
+	else
+		vis = 0;
 
 	p->col = 0;
 	p->overstep = 0;