Silence reftex compilation.

Silence reftex compilation.

* lisp/textmodes/reftex-toc.el (reftex-toc-do-promote)
(reftex-toc-promote-prepare): Pass `delta' as an explicit argument.
(reftex-toc-promote-action): Doc fix.

* lisp/textmodes/reftex-sel.el (reftex-select-item): Give local variables
`prompt', `data' a prefix.
(reftex-select-post-command-hook, reftex-select-callback)
(reftex-select-mouse-accept, reftex-select-read-cite):
Update for above name changes.

* lisp/textmodes/reftex-ref.el (reftex-reference): Rename local variable
`refstyle' to reftex-refstyle.
(reftex-offer-label-menu): Update for above name change.
* lisp/textmodes/reftex-sel.el (reftex-select-toggle-varioref): Update for
`refstyle' name change.