Bug#1112439: gpredict: Depends on unmaintained goocanvas-2.0

[Bastian Germann]

Control: forwarded -1 
https://github.com/csete/gpredict/commit/2a57f14693e0af49235dc80c905f54a058fabc07
Control: tags -1 fixed-upstream

Upstream has applied a commit that fixes this. Please consider importing
it to Debian.