bug#20677: tooltips generate garbage

[Eli Zaretskii]

> Date: Thu, 04 Jun 2015 14:25:28 +0900
> From: YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp>
> Cc: Michael Heerdegen <michael_heerdegen@web.de>,
>       20677@debbugs.gnu.org,
>       angelo.graziosi@alice.it, "Jan D." <jan.h.d@swipnet.se>
> 
> >> Yes, both patches fix the problem for me.  Like before, I tested
> >> with the tooltips in a dired buffer.
> 
> > Thanks.
> 
> > So which one of them is better, and should be pushed?
> 
> Thanks for testing.  The second one is closer to the code before the
> cairo merge, but the first would be better if it works.

I agree that the first patch looks better, as x_clear_area1 sounds
like a helper function.  So I suggest that we push that in a couple of
days.

Thanks.