Fix typo.

* style/lscape.el ("lscape"): Fix typo and parentheses.
Syntax fix.

* style/mathtools.el (LaTeX-mathtools-key-val-options): Fix defvar
syntax.
Fix bug in TeX-evince-sync-view.

* tex.el (TeX-evince-sync-view): URL-escape pdf file path when
calling evince via DBUS.
Fix 2 bugs in DBUS communication.

* tex.el (TeX-evince-sync-view): Use 0 as timestamp.
(TeX-source-correlate-sync-source): URL-decode tex file name.