sh: Optimize setprompt(0).

Avoid doing work to print an empty prompt (such as when reading scripts).
svn path=/head/; revision=295866
2016-02-21 18:54:17 +00:00 · 2016-02-21 18:54:17 +00:00 · c39f3bac71 · 2020-12-20 02:59:44 +00:00
commit c39f3bac71
parent 5036353a49
1 changed files with 2 additions and 0 deletions
--- a/bin/sh/parser.c
+++ b/bin/sh/parser.c
@ -1930,6 +1930,8 @@ static void
 setprompt(int which)
 {
 	whichprompt = which;
+	if (which == 0)
+		return;

 #ifndef NO_HISTORY
 	if (!el)