[CMake] Problems with MSVC 2010 generator

[Dominik Szczerba]

Thanks a lot for your hints. I managed to find the problem. By some
unclear reason iostream or one of its sub-includes includes math.h and
very strangely does not take the one in the system folder, instead
taking my local file called Math.h in the same folder as test.cxx
(Windows names are unfortunately case insensitive). Renaming the file
solves the issue.

Regards,
Dominik