Removed zerop in utilities.el

src/utilities.el

@@ -536,7 +536,7 @@ A number means use that text as the default."
                             (lyskom-default-value 'lyskom-current-text))))))
     ;; If the default is *still* zero, then we really can't figure
     ;; one out, so set it to nil.
-    (when (zerop default) (setq default nil))
+    (when (eq 0 default) (setq default nil))
     (cond
      ((null current-prefix-arg)
       (if (or always-read