Fix vc-annotate-show-changeset-diff-revision-at-line for git.

* lisp/vc-annotate.el (vc-annotate-show-diff-revision-at-line-internal):
Do not pass the file name to the 'previous-revision call when we
don't want a file diff.  (Bug#6489)

1 files changed, 1 insertions, 1 deletions

diff --git a/lisp/vc-annotate.el b/lisp/vc-annotate.el
index c372cb9922e..ffc11953903 100644
--- a/lisp/vc-annotate.el
+++ b/lisp/vc-annotate.el
@@ -526,7 +526,7 @@ the file in question, search for the log entry required and move point ."
           (message "Cannot extract revision number from the current line")
         (setq prev-rev
               (vc-call-backend vc-annotate-backend 'previous-revision
-                               fname rev))
+                               (if filediff fname nil) rev))
         (if (not prev-rev)
             (message "Cannot diff from any revision prior to %s" rev)
           (save-window-excursion