Added stuff to cmake to suppress warnings in newer versions of cmake.

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%403241

dlib/CMakeLists.txt

@@ -5,9 +5,15 @@
 
 # setting this makes CMake allow normal looking if else statements
 SET(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS true)
+
 cmake_minimum_required(VERSION 2.4)
+
+# Suppress cmake warnings about changes in new versions.
 if(COMMAND cmake_policy) 
    cmake_policy(SET CMP0003 NEW) 
+   if(POLICY CMP0015)
+      cmake_policy(SET CMP0015 NEW)
+   endif()
 endif()