Fixed cmake file so that it is backwards compatible with cmake 2.4

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%402616

examples/CMakeLists.txt

@@ -7,7 +7,9 @@
 # setting this makes CMake allow normal looking IF ELSE statements
 SET(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS true)
 cmake_minimum_required(VERSION 2.4)
-cmake_policy(SET CMP0003 NEW)
+if(COMMAND cmake_policy) 
+   cmake_policy(SET CMP0003 NEW) 
+endif()
 
 PROJECT(examples)