fix: set CMAKE_POLICY_DEFAULT_CMP0091 globally for all FetchContent subprojects

Author: hypernewbie

CMakeLists.txt

@@ -7,6 +7,7 @@ endif()
 project(VEFontCache LANGUAGES C CXX)
 
 set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded")
+set(CMAKE_POLICY_DEFAULT_CMP0091 NEW)
 
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
@@ -26,7 +27,6 @@ set(VRHI_VERSION "v0.1.4" CACHE STRING "VRHI release version to fetch")
 include(FetchContent)
 
 if(VEFC_ENABLE_FREETYPE)
-    set(CMAKE_POLICY_DEFAULT_CMP0091 NEW)
     FetchContent_Declare(
         freetype
         GIT_REPOSITORY https://github.com/freetype/freetype.git
@@ -39,7 +39,6 @@ if(VEFC_ENABLE_FREETYPE)
 endif()
 
 if(VEFC_ENABLE_HARFBUZZ)
-    set(CMAKE_POLICY_DEFAULT_CMP0091 NEW)
     FetchContent_Declare(
         harfbuzz
         GIT_REPOSITORY https://github.com/harfbuzz/harfbuzz.git