EWW: Fix helm-defswitcher args.

.emacs.d/lisp/init-eww.el

@@ -75,10 +75,12 @@ If BUFFERS is not specified, then reload all buffers."
    (lambda (b)
      (with-current-buffer b
        (derived-mode-p 'eww-mode)))
-   (lambda () (if (thing-at-point-url-at-point)
-                  ;; This only works fine if no EWW buffer is up.
-                  (call-interactively 'eww)
-                (helm-eww)))
+   (lambda (&optional _)
+     (interactive)
+     (if (thing-at-point-url-at-point)
+         ;; This only works fine if no EWW buffer is up.
+         (call-interactively 'eww)
+       (helm-eww)))
    helm-eww))
 
 (defun ambrevar/eww (url)