[x-face] doesn't display in 5.2.25 with emacs-19.31

[Danny Siu <dsiu@mv.us.adobe.com>]

It works in 5.2.19.

I found out that in 5.2.25, shell-file-name and shell-command-switch are used
instead of "sh" and "-c".  In my case, shell-file-name is set to "/bin/csh"
an shell-command-switch is "-c" and I got error from xv like "file /tmp/xxx
contains no data".   I tried setting shell-command-switch to "-f -c" to
ignore my .cshrc file but it still doesn't give. 

If I change shell-file-name to "sh", then x-face works again.

gnus-article-x-face-command is set to "{ echo '/* Width=48, Height=48 */';
uncompface; } | icontopbm | xv -quit -" by gnus-ems.el.

In gnus.el:

5.2.19:
------
(defun gnus-article-display-x-face (&optional force)
  ...
  ...
  ...
		 (start-process
		  "gnus-x-face" nil "sh" "-c" gnus-article-x-face-command))
  ...


5.2.25:
------
(defun gnus-article-display-x-face (&optional force)
  ...
  ...
  ...
		 (start-process
		  "gnus-x-face" nil shell-file-name shell-command-switch
		  gnus-article-x-face-command))
  ...

Any hints?

-- 
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|  Danny Dick-Fung Siu                http://www-leland.stanford.edu/~dsiu |
|  Reference System Group             http://www.csua.berkeley.edu/~dsiu   |
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