emacs-28 335a5a9e0f: Make the `f' command work in image-mode again

[Lars Ingebrigtsen]

branch: emacs-28
commit 335a5a9e0f956d466305c73b6257a6caaefa3533
Author: Lars Ingebrigtsen <larsi@gnus.org>
Commit: Lars Ingebrigtsen <larsi@gnus.org>

    Make the `f' command work in image-mode again
    
    * lisp/image.el (image-show-frame): Protect against not having
    computed the animation data yed (bug#53489).
---
 lisp/image.el | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lisp/image.el b/lisp/image.el
index af30353b95..ea1a22698c 100644
--- a/lisp/image.el
+++ b/lisp/image.el
@@ -872,8 +872,9 @@ Frames are indexed from 0.  Optional argument NOCHECK 
non-nil means
 do not check N is within the range of frames present in the image."
   (unless nocheck
     (if (< n 0) (setq n 0)
-      (setq n (min n (1- (car (plist-get (cdr image)
-                                         :animate-multi-frame-data)))))))
+      (setq n (min n (1- (car (or (plist-get (cdr image)
+                                             :animate-multi-frame-data)
+                                  (image-multi-frame-p image))))))))
   (plist-put (cdr image) :index n)
   (force-window-update (plist-get (cdr image) :animate-buffer)))