Fix bug #8177 with re-visiting image files.

 files.el (find-file-noselect): Don't ask about re-visiting
 non-literally if the file is already visited in image-mode.

lisp/ChangeLog

+2011-03-05  Eli Zaretskii  <eliz@gnu.org>
+
+	* files.el (find-file-noselect): Don't ask about re-visiting
+	non-literally if the file is already visited in image-mode.
+	(Bug#8177)
+
 2011-03-05  Glenn Morris  <rgm@gnu.org>
 	* eshell/esh-mode.el (eshell-kill-buffer-function): New function.

lisp/files.el

@@ -1894,8 +1894,8 @@ the various files."
 			   (not nonexistent)
 			   ;; It is confusing to ask whether to visit
 			   ;; non-literally if they have the file in
-			   ;; hexl-mode.
-			   (not (eq major-mode 'hexl-mode)))
+			   ;; hexl-mode or image-mode.
+			   (not (memq major-mode '(hexl-mode image-mode))))
 		  (if (buffer-modified-p)
 		      (if (y-or-n-p
 			   (format