Tramp: Disable paging with PAGER=cat

Fixes: debbugs:19870

* net/tramp-sh.el (tramp-remote-process-environment): Disable paging
with PAGER=cat.

lisp/ChangeLog

+2015-02-15  Jérémy Compostella  <jeremy.compostella@gmail.com>
+
+	* net/tramp-sh.el (tramp-remote-process-environment): Disable paging
+	with PAGER=cat.  (Bug#19870)
+
 2015-02-13  Glenn Morris  <rgm@gnu.org>
 	* textmodes/flyspell.el (flyspell-duplicate-distance):

lisp/net/tramp-sh.el

@@ -457,7 +457,7 @@ as given in your `~/.profile'."
     ,(format "TERM=%s" tramp-terminal-type)
     "EMACS=t" ;; Deprecated.
     ,(format "INSIDE_EMACS='%s,tramp:%s'" emacs-version tramp-version)
-    "CDPATH=" "HISTORY=" "MAIL=" "MAILCHECK=" "MAILPATH=" "PAGER=\"\""
+    "CDPATH=" "HISTORY=" "MAIL=" "MAILCHECK=" "MAILPATH=" "PAGER=cat"
     "autocorrect=" "correct=")
   "List of environment variables to be set on the remote host.