isspace should only get unsigned-char values or EOF

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25010 dc483132-0cff-0310-8789-dd5450dbe970

diff --git a/src/lib/kadm5/alt_prof.c b/src/lib/kadm5/alt_prof.c
index 6537d302573fedde678722e039b965a9fb6127ba..35f078e1accec331368229cce495bc5e5efc7a91 100644 (file)
--- a/src/lib/kadm5/alt_prof.c
+++ b/src/lib/kadm5/alt_prof.c
@@ -1161,9 +1161,11 @@ krb5_match_config_pattern(const char *string, const char *pattern)
     int len = strlen(pattern);
 
     for (ptr = strstr(string,pattern); ptr != 0; ptr = strstr(ptr+len,pattern)) {
-        if (ptr == string || isspace(*(ptr-1)) || *(ptr-1) ==',') {
+        if (ptr == string
+            || isspace((unsigned char)*(ptr-1))
+            || *(ptr-1) ==',') {
             next = *(ptr + len);
-            if (next == '\0' || isspace(next) || next ==',') {
+            if (next == '\0' || isspace((unsigned char)next) || next ==',') {
                 return TRUE;
             }
         }