From: Glenn Morris <rgm@gnu.org>
Date: Thu, 1 Dec 2011 22:30:12 +0000 (-0500)
Subject: Tweak previous em-hist.el change.
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Tweak previous em-hist.el change.
---

diff --git a/lisp/eshell/em-hist.el b/lisp/eshell/em-hist.el
index 975f1b17143..5ae419f7ba9 100644
--- a/lisp/eshell/em-hist.el
+++ b/lisp/eshell/em-hist.el
@@ -263,8 +263,9 @@ element, regardless of any text on the command line.  In that case,
   (or eshell-history-size
       (let ((hsize (getenv "HISTSIZE")))
         (setq eshell-history-size
-	      (if (and (> (length hsize) 0)
-		       (integerp (setq hsize (string-to-number hsize))))
+	      (if (and (stringp hsize)
+		       (integerp (setq hsize (string-to-number hsize)))
+		       (> hsize 0))
 		  hsize
 		128))))