fix UB with the function iscntrl()

From commit 6818e07291f3b2913e687c8ec3d3fe4711724050 by NRK, thanks
2022-03-26 17:58:47 +01:00 · 2022-03-26 17:58:47 +01:00 · d4b980b763
parent 273d967324
commit d4b980b763
1 changed files with 1 additions and 1 deletions
--- a/dmenu.c
+++ b/dmenu.c
@ -503,7 +503,7 @@ keypress(XKeyEvent *ev)
 	switch(ksym) {
 	default:
 insert:
-		if (!iscntrl(*buf))
+		if (!iscntrl((unsigned char)*buf))
 			insert(buf, len);
 		break;
 	case XK_Delete: