link-hint turns all errors from browse-url into wrong-number-of-arguments

[bcc32]

When browse-url-browser-function signals an error, link-hint-open-link and related commands replace the error with a wrong-number-of-arguments error, due to link-hint--apply calling the function several times with different numbers of arguments.

This seems to be due to a desire to accommodate different calling conventions, but I think link-hint--apply should only check for wrong-number-of-arguments, not just any error.

For example, evaluating the following code:

;; https://google.com/
(let ((browse-url-browser-function
       (lambda (url &rest args)
         (error "Failed to start browser: %S" url))))
  (call-interactively 'link-hint-open-link))

Causes this error:

Debugger entered--Lisp error: (wrong-number-of-arguments (1 . 1) 0)
  browse-url()
  funcall(browse-url)
  (condition-case nil (funcall func args) (error (funcall func)))
  (condition-case nil (apply func args) (error (condition-case nil (funcall func args) (error (funcall func)))))
  link-hint--apply(browse-url "https://google.com/" link-hint--process-url :open)
...

whereas the expected error is:

Failed to start browser: "https://google.com/"