From: Hiltjo Posthuma <hiltjo@codemadness.org>
Date: Sat, 26 Mar 2022 16:58:47 +0000 (+0100)
Subject: fix UB with the function iscntrl()
X-Git-Url: https://git.atheridis.org/?a=commitdiff_plain;h=e73651f12a406629778f02d8e5acbe2caec0dfc2;p=suckless%2Fdmenu.git

fix UB with the function iscntrl()

From commit 6818e07291f3b2913e687c8ec3d3fe4711724050 by NRK, thanks
---

diff --git a/dmenu.c b/dmenu.c
index 085dc29..839f6cc 100644
--- a/dmenu.c
+++ b/dmenu.c
@@ -415,7 +415,7 @@ keypress(XKeyEvent *ev)
 	switch(ksym) {
 	default:
 insert:
-		if (!iscntrl(*buf))
+		if (!iscntrl((unsigned char)*buf))
 			insert(buf, len);
 		break;
 	case XK_Delete: