Set CMake policy CMP0092

Disable cmake's automatic /W3 for MSVC

CMakeLists.txt

@@ -35,6 +35,7 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #----------------------------------------------------------------------
 SET(CMAKE_POLICY_DEFAULT_CMP0074 NEW)
+cmake_policy(SET CMP0092 NEW)
 
 CMAKE_MINIMUM_REQUIRED( VERSION 3.0 )