[CMake] ctest returns 255 after running ctest_test() if no tests are available

[Rolf Eike Beer]

>     Error in read script:
> /satsop/build/kitt-cmake-based-addons-for-legacy-trunk/kitt.cmake

This one I also see rather often. What does this mean? "There was any
warning or failure on test or build"?

Eike