Make fileloop skip missing files

* lisp/fileloop.el (fileloop-next-file): If a file doesn't exist,
skip to the next one (bug#44979).

etc/NEWS

@@ -2340,6 +2340,9 @@ This command, called interactively, toggles the local value of
 
 ** Miscellaneous
 
+---
+*** fileloop will now skip missing files instead of signalling an error.
+
 +++
 *** ".dir-locals.el" now supports setting 'auto-mode-alist'.
 The new 'auto-mode-alist' specification in ".dir-locals.el" files can

lisp/fileloop.el

@@ -120,7 +120,10 @@ operating on the next file and nil otherwise."
         (kill-all-local-variables)
         (erase-buffer)
         (setq new next)
-        (insert-file-contents new nil))
+        (condition-case nil
+            (insert-file-contents new nil)
+          (file-missing
+           (fileloop-next-file novisit))))
       new)))
 
 (defun fileloop-continue ()