Bug#1130549: evince: Thumbnails not displayed - just empty icon

[Ralf Jung]

I can confirm this problem in version 49~alpha-2, it is a recent regression that 
only started occurring after an apt-upgrade.

(Between this and the scroll wheel zoom issue, this alpha seems to have quite a 
few problems -- I am somewhat surprised to see that an alpha version has been 
propagated all the way to testing.)

Kind regards,
Ralf