* progmodes/cc-vars.el (defcustom-c-stylevar): Eval VAL.

* progmodes/cc-vars.el (defcustom-c-stylevar): Eval VAL.
(c-comment-continuation-stars): No longer declare with
cc-bytecomp-obsolete-var and cc-bytecomp-defvar.
(c-block-comment-prefix): Use symbol-value to
access c-comment-continuation-stars.
* progmodes/cc-mode.el (c-initialize-cc-mode):
Use symbol-value to access c-comment-continuation-stars.