(operator_name): Cast argument of isalpha to

unsigned char.

diff --git a/lib-src/ebrowse.c b/lib-src/ebrowse.c
index 7fbcba2d63bfb2e8f9e5684df8cded2f60be3d4c..b5a9f48946ab171c24bc3e42095c7e5297a5c90d 100644 (file)
--- a/lib-src/ebrowse.c
+++ b/lib-src/ebrowse.c
@@ -2867,7 +2867,7 @@ operator_name (sc)
           MATCH ();
 
          /* If this is a simple operator like `+', stop now.  */
-         if (!isalpha (*s) && *s != '(' && *s != '[')
+         if (!isalpha ((unsigned char) *s) && *s != '(' && *s != '[')
            break;
 
          ++tokens_matched;