style: Change boolean style convention
style: Change boolean style convention

Following
https://lists.freedesktop.org/archives/spice-devel/2017-February/035800.html
, the consensus was to use 'bool' rather than 'gboolean', and to use
true/false rather than TRUE/FALSE. New code should attempt to follow
the new style.

Signed-off-by: Frediano Ziglio <55d48b080b2e443e395cde84d2c83b135a4ff48e@redhat.com>
Acked-by: Christophe Fergeau <05b95054a663c388a4e33d95828cb30f0370f8ef@redhat.com>

fgouget/spice,fgouget/spice,fgouget/spice,fgouget/spice