Fix a ubsan complaint "applying zero offset to null pointer"

[yamt]

No description provided.

[yamt]

the test failure looks unrelated. but honestly speaking i don't know what it's testing.

[wenyongh]

the test failure looks unrelated. but honestly speaking i don't know what it's testing.

The CI ran failed when testing wamr-ide:

    1) Rust formatters
  2 passing (50s)
  1 failing
  1) Inegration Tests
       Rust formatters:

      The Deque summary string looks different than expected
      + expected - actual

      -alloc::collections::vec_deque::VecDeque<int, alloc::alloc::Global> @ 0xfff1c
      + (5) VecDeque[1, 2, 3, 4, 5]
      
  	at Context.<anonymous> (out/test/suite/extension.test.js:159:27)
  	at Generator.next (<anonymous>)
  	at fulfilled (out/test/suite/extension.test.js:9:58)
  	at process.processTicksAndRejections (node:internal/process/task_queues:95:5)

It failed recently when PR was created, it should be related to the code below:
https://github.com/bytecodealliance/wasm-micro-runtime/blob/main/test-tools/wamr-ide/VSCode-Extension/src/test/suite/extension.test.ts#L177-L178

Not sure whether it is caused by the version update of nodejs or vscode, maybe @xujuntwt95329 and @TianlongLiang can help look into it after vocation.

I think it should be a minor issue, let's merge the PRs if they are well reviewed and other CIs run well.