Fixes for defcustoms, prompted by cus-test-opts

Fixes for defcustoms, prompted by cus-test-opts

* lisp/files.el (save-some-buffers-default-predicate):
* lisp/time.el (display-time-world-list):
* lisp/gnus/gnus-art.el (gnus-article-show-cursor):
* lisp/progmodes/cc-vars.el (c-noise-macro-with-parens-names):
* lisp/progmodes/verilog-mode.el (verilog-auto-wire-type):
* lisp/textmodes/less-css-mode.el (less-css-output-directory)
(less-css-output-file-name, less-css-input-file-name):
* lisp/vc/emerge.el (emerge-metachars):
* lisp/vc/vc-hg.el (vc-hg-symbolic-revision-styles):
Fix :types.
* lisp/net/newst-backend.el (newsticker-url-list-defaults): Fix url.