Fix warnings on boolean/int conversions for is_managed/set_managed API unit tests. Issue 3580.
Fix warnings on boolean/int conversions for is_managed/set_managed API unit tests. Issue 3580.

OpenCMISS/zinc,hsorby/zinc,OpenCMISS/zinc,OpenCMISS/zinc,hsorby/zinc,OpenCMISS/zinc,hsorby/zinc,hsorby/zinc