Bug#972778: zbar ftbfs with python3.9

[Graham Inggs]

Control: tags -1 + fixed-upstream
Control: forwarded -1 https://github.com/mchehab/zbar/issues/92

Hi Maintainer

This is already fixed upstream [1].

Regards
Graham


[1] 
https://github.com/mchehab/zbar/commit/938d39716488b545b92c28f48acc94a7b8fc9138