Metatable

void typel_pushinst(lua_State *state, typel_class *type, void *self, void *param) {
	if(!self) {
		lua_pushnil(state);
		return 0;
	}
	typel_inst *inst;
	CALLOC(inst,typel_inst,1);
	lua_pushlightuserdata(state,inst);
	inst->self = self;
	inst->type = type;
	sl_pushref(state, typel_mtref); // set the metatable
	lua_setmetatable(state, -2);
	lua_newtable(state); // create a new data table and store a ref
	inst->dataref = luaL_ref(state, LUA_REGISTRYINDEX);
	if(type->init) { type->init(state, inst->self, inst->dataref, param); }
	//else { luaL_error(state,"dataref no longer exists"); }
}