Update CMakeLists.txt

fix to skip mpeg on mac (would require another lib for mp3)

Engine/lib/CMakeLists.txt

@@ -282,6 +282,7 @@ set(BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
 set(ENABLE_CPACK OFF CACHE BOOL "" FORCE)
 set(ENABLE_PACKAGE_CONFIG OFF CACHE BOOL "" FORCE)
 set(INSTALL_PKGCONFIG_MODULE OFF CACHE BOOL "" FORCE)
+set(ENABLE_MPEG OFF CACHE BOOL "" FORCE)
 set(ENABLE_EXPERIMENTAL ON CACHE BOOL "" FORCE)
 add_subdirectory(libsndfile ${TORQUE_LIB_TARG_DIRECTORY}/libsndfile EXCLUDE_FROM_ALL)