Bug#832452: twinkle: Crashes during call when switching desktop

[Peter Colberg <peter@colberg.org>]

Dear Qt Maintainers,

The jessie backport of twinkle has been found to abort with a
segmentation fault in the DRI driver under certain circumstances.

Since the segfault has been produced with both the nouveau and the
i965 driver, and since noone has reported a similar issue with twinkle
in stretch, it is likely triggered by the version of Qt5 in jessie.

Please refer to the bug log for a stack trace of twinkle.

Regards,
Peter