[REVIEW:3-5 3-5-5?] fdo#30519 bad slide transitions with cairo

[David Tardon]

Hi all,

commit 012b43d571aaa4f79b7f6fcfa92939e8d19af492 fixes the
Cover/Uncover/Push groups of slide transitions. It also fixes any
animation that would use the 'scrollUpdate' shortcut for updating the
screen (i.e., when there is exactly one unchanging object moving over
unchanging background).

It would be nice to have this in 3.5.5 too, if it is not too late yet.

D.