Frontend:
* Possible fix to engine window losing it's focus while Xfire is active (too sporadic to test)
IF(APPLE)
file(GLOB lua_src *.c *.h)
set(CMAKE_OSX_ARCHITECTURES "x86_64;i386;ppc7400")
set (build_type STATIC)
add_definitions(-DLUA_USE_LINUX)
add_library (lua ${build_type} ${lua_src})
ENDIF(APPLE)