* lisp/progmodes/grep.el (grep-process-setup): Don't check code for 1

because `zgrep' returns 1 for successful matches.

Fixes: debbugs:9226

lisp/ChangeLog

@@ -1,3 +1,8 @@
+2011-09-18  Juri Linkov  <juri@jurta.org>
+
+	* progmodes/grep.el (grep-process-setup): Don't check code for 1
+	because `zgrep' returns 1 for successful matches (bug#9226).
+
 2011-09-18  Juri Linkov  <juri@jurta.org>
 
 	* info.el (Info-extract-menu-node-name): Check the second match

lisp/progmodes/grep.el

@@ -476,7 +476,7 @@ Set up `compilation-exit-message-function' and run `grep-setup-hook'."
 	     ;; so the buffer is still unmodified if there is no output.
 	     (cond ((and (zerop code) (buffer-modified-p))
 		    '("finished (matches found)\n" . "matched"))
-		   ((or (= code 1) (not (buffer-modified-p)))
+		   ((not (buffer-modified-p))
 		    '("finished with no matches found\n" . "no match"))
 		   (t
 		    (cons msg code)))