Add Data:getFFIPointer. Similar to Data:getPointer but returns a cdata pointer directly (or nil if the FFI isn't available).

It should be preferred instead of Data:getPointer because the latter uses lightuserdata which can't store more all possible memory addresses on some new arm64 architectures, when LuaJIT is used.

src/modules/data/wrap_ByteData.cpp

@@ -39,6 +39,7 @@ static const luaL_Reg w_ByteData_functions[] =
 int luaopen_bytedata(lua_State *L)
 {
 	luax_register_type(L, &ByteData::type, w_Data_functions, w_ByteData_functions, nullptr);
+	love::data::luax_rundatawrapper(L, ByteData::type);
 	return 0;
 }