Added cmake_policy(SET CMP0043 NEW) usage when compiling against Qt5 as it was causing a warning we couldn't fix on the OSG side otherwise.

git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/branches/OpenSceneGraph-3.4@14951 16af8721-9629-0410-8352-f15c8da7e697

CMakeLists.txt

@@ -692,11 +692,20 @@ IF(OSG_USE_QT AND NOT ANDROID)
 
     IF  (DESIRED_QT_VERSION)
         IF  (DESIRED_QT_VERSION MATCHES 5)
-              FIND_PACKAGE(Qt5Widgets)
+              
+            IF(COMMAND cmake_policy)
+                # Qt5 qt5_use_modules usage was causing "Policy CMP0043 is not set: Ignore COMPILE_DEFINITIONS_<Config> properties." warnings
+                cmake_policy(SET CMP0043 NEW)
+            ENDIF()
+            
+            
+            FIND_PACKAGE(Qt5Widgets)
+              
+              
         ELSEIF (DESIRED_QT_VERSION MATCHES 4)
-              FIND_PACKAGE(Qt4)
+            FIND_PACKAGE(Qt4)
         ELSE()
-              FIND_PACKAGE(Qt3)
+            FIND_PACKAGE(Qt3)
         ENDIF()
 
     ELSE()