small grep.el fix

[Dan Nicolaescu]

It seems that there's a typo in grep.el, it uses
executable-command-find-unix-p, that does not exist instead of
executable-command-find-posix-p. 

It seems to be the result of this checkin:

2004-01-29  Jari Aalto  <address@hidden>

        * progmodes/executable.el (executable-command-find-posix-p):
        New.  Check if find handles arguments Posix-style.

        * progmodes/grep.el (grep-compute-defaults):
        Use executable-command-find-posix-p.
        (grep-find): Check `grep-find-command'.

Can somebody please apply this patch? 


2004-02-12  Dan Nicolaescu  <address@hidden>

        * progmodes/grep.el (grep-compute-defaults): Fix typos.

*** grep.el.~1.6.~      Mon Feb  9 23:56:10 2004
--- grep.el     Thu Feb 12 10:39:28 2004
***************
*** 318,326 ****
              'gnu)))
    (unless grep-find-command
      (setq grep-find-command
!           (cond ((not (executable-command-find-unix-p "find"))
                 (message
!                 (concat "compile.el: Unix type find(1) not found. "
                          "Please set `grep-find-command'."))
                 nil)
                ((eq grep-find-use-xargs 'gnu)
--- 318,326 ----
              'gnu)))
    (unless grep-find-command
      (setq grep-find-command
!           (cond ((not (executable-command-find-posix-p "find"))
                 (message
!                 (concat "compile.el: Posix type find(1) not found. "
                          "Please set `grep-find-command'."))
                 nil)
                ((eq grep-find-use-xargs 'gnu)