Bug#779848: atril forgets to unlock a locked mutex

[Vlad Orlov]

Source: atril
Version: 1.8.1+dfsg1-3
Severity: important

At one point in the code it forgets to unlock a locked mutex.
That might lead to unwanted consequences in some other parts
of code.
The upstream pull request [1] fixes that.


[1] https://github.com/mate-desktop/atril/pull/129