"No docbook" changes

[Alexandre Julliard]

Vincent Béron <vberon at mecano.gme.usherb.ca> writes:

> This caused rpm generation to fail because false returns 1.
>
> Changelog:
> Change the command to true rather than false if docbook is not
> installed.

If docbook is not installed then generating the doc should definitely
yield an error. You are free to ignore the error in the rpm
generation, but the makefile should still report it.

-- 
Alexandre Julliard
julliard at winehq.com