[Cooker] xawtv-3.46: xfs is not restared in postinstall script

[Ural Khassanov]

xawtv-3.46-1mdk, current postinstall script:

cd /.../fonts/misc
mkfontdir
... xset fp rehash
... update-menus

New fonts are installed, so xfs should be restarted  before doing xset fp rehash. 
Check that xfs is actually installed first.

And new xawtv 3.46 segfaults after a number of  tv channel switchings. This didn't 
happen with old versions.

Ural Khassanov, <ural2_at_uwc.ufanet.ru>