(read_alias_file): Cast isspace argument to 'unsigned char'.

diff --git a/intl/localealias.c b/intl/localealias.c
index a5ef38b..2226897 100644 (file)
--- a/intl/localealias.c
+++ b/intl/localealias.c
@@ -256,21 +256,21 @@ read_alias_file (fname, fname_len)
 
       cp = buf;
       /* Ignore leading white space.  */
-      while (isspace (cp[0]))
+      while (isspace ((unsigned char) cp[0]))
        ++cp;
 
       /* A leading '#' signals a comment line.  */
       if (cp[0] != '\0' && cp[0] != '#')
        {
          alias = cp++;
-         while (cp[0] != '\0' && !isspace (cp[0]))
+         while (cp[0] != '\0' && !isspace ((unsigned char) cp[0]))
            ++cp;
          /* Terminate alias name.  */
          if (cp[0] != '\0')
            *cp++ = '\0';
 
          /* Now look for the beginning of the value.  */
-         while (isspace (cp[0]))
+         while (isspace ((unsigned char) cp[0]))
            ++cp;
 
          if (cp[0] != '\0')
@@ -279,7 +279,7 @@ read_alias_file (fname, fname_len)
              size_t value_len;
 
              value = cp++;
-             while (cp[0] != '\0' && !isspace (cp[0]))
+             while (cp[0] != '\0' && !isspace ((unsigned char) cp[0]))
                ++cp;
              /* Terminate value.  */
              if (cp[0] == '\n')