Render wikipedia.org correctly.
Martin Nagy <mnagy@redhat.com>

diff -up Mosaic-src/src/globalhist.c.hash_url Mosaic-src/src/globalhist.c
--- Mosaic-src/src/globalhist.c.hash_url	2008-11-28 21:05:08.000000000 +0100
+++ Mosaic-src/src/globalhist.c	2008-11-28 21:09:56.000000000 +0100
@@ -210,7 +210,7 @@ static int hash_url (char *url)
   len = strlen (url);
   val = 0;
   for (i = 0; i < 10; i++)
-    val += url[(i * val + 7) % len];
+    val += (unsigned char)url[(i * val + 7) % len];
 
   return val % HASH_TABLE_SIZE;
 }