Cast ctype functions' arguments to unsigned char.

ok guenther@

diff --git a/games/hack/hack.u_init.c b/games/hack/hack.u_init.c
index ff2adad..a51a269 100644 (file)
--- a/games/hack/hack.u_init.c
+++ b/games/hack/hack.u_init.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: hack.u_init.c,v 1.9 2009/10/27 23:59:25 deraadt Exp $ */
+/*     $OpenBSD: hack.u_init.c,v 1.10 2015/10/24 17:40:38 mmcc Exp $   */
 
 /*
  * Copyright (c) 1985, Stichting Centrum voor Wiskunde en Informatica,
@@ -169,7 +169,8 @@ u_init()
        rolesyms[i] = 0;
 
        if ((pc = pl_character[0])) {
-               if (islower(pc)) pc = toupper(pc);
+               if (islower((unsigned char)pc))
+                       pc = toupper((unsigned char)pc);
                if ((i = role_index(pc)) >= 0)
                        goto got_suffix;        /* implies experienced */
                printf("\nUnknown role: %c\n", pc);
@@ -202,7 +203,8 @@ u_init()
        printf("? [%s] ", rolesyms);
 
        while ((pc = readchar())) {
-               if(islower(pc)) pc = toupper(pc);
+               if(islower((unsigned char)pc))
+                       pc = toupper((unsigned char)pc);
                if((i = role_index(pc)) >= 0) {
                        printf("%c\n", pc);     /* echo */
                        (void) fflush(stdout);  /* should be seen */