[Bf-blender-cvs] [95ad34c5d70] blender-v2.82-release: Fix CMake error with versions older than 3.9

[Brecht Van Lommel]

Commit: 95ad34c5d70f3def18a8286f2cdde85371031988
Author: Brecht Van Lommel
Date:   Mon Feb 3 18:44:52 2020 +0100
Branches: blender-v2.82-release
https://developer.blender.org/rB95ad34c5d70f3def18a8286f2cdde85371031988

Fix CMake error with versions older than 3.9

===================================================================

M	CMakeLists.txt

===================================================================

diff --git a/CMakeLists.txt b/CMakeLists.txt
index bbb528607c8..2bac16c339a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -98,7 +98,9 @@ cmake_policy(SET CMP0010 NEW)
 cmake_policy(SET CMP0014 NEW)
 
 # Silence draco warning on macOS, new policy works fine.
-cmake_policy(SET CMP0068 NEW)
+if(POLICY CMP0068)
+  cmake_policy(SET CMP0068 NEW)
+endif()
 
 #-----------------------------------------------------------------------------
 # Load some macros.