* bib-cite.el (bib-highlight-mouse): Change regexp to cope with
multiple optional arguments of a macro.
Fix C-x ` (next-error) for compile commands.

* tex-buf.el (TeX-next-error, TeX-previous-error): Call
`next-error' also if last TeX command was a compile command (e.g.,
Check, ChkTeX).
(TeX-run-compile): Save compilation buffer in
`TeX-command-buffer'.