one less

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@4852 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/libdingaling/src/libdingaling.c

@@ -1763,7 +1763,7 @@ void ldl_handle_send_vcard(ldl_handle_t *handle, char *from, char *to, char *id,
 		vcard = text;
 	} else {
 		if (ap && (strstr(vcard, "photo") || strstr(vcard, "PHOTO"))) {
-			ldl_random_string(ap->hash, sizeof(ap->hash), NULL);
+			ldl_random_string(ap->hash, sizeof(ap->hash) -1, NULL);
 		}
 	}