Cast toupper()'s argument to unsigned char.

ok guenther@

diff --git a/games/boggle/boggle/mach.c b/games/boggle/boggle/mach.c
index 0eb7889..3b1424a 100644 (file)
--- a/games/boggle/boggle/mach.c
+++ b/games/boggle/boggle/mach.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: mach.c,v 1.14 2014/12/04 06:12:33 deraadt Exp $       */
+/*     $OpenBSD: mach.c,v 1.15 2015/10/24 18:51:40 mmcc Exp $  */
 /*     $NetBSD: mach.c,v 1.5 1995/04/28 22:28:48 mycroft Exp $ */
 
 /*-
@@ -687,7 +687,7 @@ tty_showboard(char *b)
                if (ch == 'q')
                        printw("Qu");
                else
-                       printw("%c ", toupper(ch));
+                       printw("%c ", toupper((unsigned char)ch));
                if (HISET(b[i]))
                        attroff(A_BOLD);
                if ((i + 1) % grid == 0) {