Bug#913513: widelands FTBFS with ICU 63.1

[László Böszörményi (GCS)]

Source: widelands
Source-Version: 1:19+repack-5
Severity: important
Tags: patch
Usertags: icu63

Dear Maintainer,

ICU 63.1 recently released, packaged and uploaded to experimental.
Its transition is going to start soon. However your package fails to
build with this version. I attach a patch which fixes the problem.
Please check if it works with the version in Sid and upload the
package when it's feasible for you.

Thanks,
Laszlo/GCS