testedid: make sure to use uint consistently
Summary:
It seems like compilation was broken with some configurations, e.g.
https://mail.kde.org/pipermail/plasma-devel/2018-August/087929.html
Fixing the types to be proper should address the issue.
Reviewers: Plasma, apol
Reviewed By: apol
Subscribers: plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D14548