Function set2

deps/lua/src/ltablib.c:173–176

static void set2 (lua_State *L, int i, int j) {
  lua_rawseti(L, 1, i);
  lua_rawseti(L, 1, j);
}

static int sort_comp (lua_State *L, int a, int b) {
  if (!lua_isnil(L, 2)) {  /* function? */