qga/wixl: simplify some pre-processing

Sadly, wixl doesn't have 'elif'.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Konstantin Kostiuk <kkostiuk@redhat.com>
Message-Id: <20220525144140.591926-14-marcandre.lureau@redhat.com>
1 file changed