Function freeupval

lib/lua/src/lgc.c:765–769

static void freeupval (lua_State *L, UpVal *uv) {
  if (upisopen(uv))
    luaF_unlinkupval(uv);
  luaM_free(L, uv);
}


static void freeobj (lua_State *L, GCObject *o) {