message: Enable Clang warning "-Wshorten-64-to-32"
diff: @@ -398,6 +398,7 @@ if(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
  if(CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 9.0)
  list(APPEND warning_flags -Wshadow)
  + list(APPEND warning_flags -Wshorten-64-to-32)
  endif()
  if(CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0 AND NOT APPLE)
  