wocky-test-sasl-auth: use g_assert_error
wocky-test-sasl-auth: use g_assert_error

freedesktop-unofficial-mirror/wocky,freedesktop-unofficial-mirror/wocky,freedesktop-unofficial-mirror/wocky,noonien-d/wocky,noonien-d/wocky,noonien-d/wocky