[PATCH] Use ibuffer-buffer-file-name in ibuffer filename filter

[陳侃如]

So that the filter works for dired buffer too. The original behavior is
confusing because you could see the buffer name in the *Ibuffer* buffer
but the filter didn't pick it up.

# Bazaar merge directive format 2 (Bazaar 0.90)
# revision_id: address@hidden
# target_branch: bzr://bzr.savannah.gnu.org/emacs/trunk/
# testament_sha1: a6ecbede343a3850a462576604f134690e9df849
# timestamp: 2013-07-17 16:14:54 +0800
# base_revision_id: address@hidden
# 
# Begin patch
=== modified file 'lisp/ChangeLog'
--- lisp/ChangeLog      2013-07-15 02:33:54 +0000
+++ lisp/ChangeLog      2013-07-17 08:00:21 +0000
@@ -1,3 +1,8 @@
+2013-07-17  Kan-Ru Chen (陳侃如)  <address@hidden>
+
+       * ibuf-ext.el (filename): Use ibuffer-buffer-file-name so the
+       filename filter works consistently with the displayed filename.
+
 2013-07-15  Paul Eggert  <address@hidden>
 
        * shell.el (explicit-bash-args): Remove obsolete hack for Bash 1.x.

=== modified file 'lisp/ibuf-ext.el'
--- lisp/ibuf-ext.el    2013-06-12 11:42:12 +0000
+++ lisp/ibuf-ext.el    2013-07-17 08:00:21 +0000
@@ -1050,7 +1050,7 @@
   "Toggle current view to buffers with filename matching QUALIFIER."
   (:description "filename"
    :reader (read-from-minibuffer "Filter by filename (regexp): "))
-  (ibuffer-awhen (buffer-local-value 'buffer-file-name buf)
+  (ibuffer-awhen (with-current-buffer buf (ibuffer-buffer-file-name))
     (string-match qualifier it)))
 
 ;;;###autoload (autoload 'ibuffer-filter-by-size-gt  "ibuf-ext")

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