Bug#1149371: golang-github-viccon-sturdyc: FTBFS: flaky test

[Santiago Vila]

Note: Upstream says this was a bug in the code after all.

This is the commit fixing the issue:

https://github.com/viccon/sturdyc/commit/dde2e7f39f677743a653b9edeace1b2e7acf29bb

Thanks.