[CMake] Cmake on Cgwin and WIN32 (actually cmake_minimum_required)

[Thomas Nilsson]

Cmake no longer defines WIN32 on Cygwin. That's alright. However, in the 
message you get when ccmake-ing it says:

     "or set the minimum  required version of CMake to 2.8.4 or higher"

I added

     cmake_minimum_required(VERSION 2.8.4)

but the message still appears. Am I miss-interpreting the message or the 
cmake_minimum_command?

/Thomas