Function check

example/memory.c:28–33

void check(bool success) {
  if (!success) {
    printf("> Error, expected success\n");
    exit(1);
  }
}

void check_call(wasm_func_t* func, int i, wasm_val_t args[], int32_t expected) {
  wasm_val_t r = WASM_INIT_VAL;