Attach (recommended) or Link to PDF file here:
[occurmin0.pdf](https://github.com/mozilla/pdf.js/files/7340277/occurmin0.pdf)

Configuration:
- Web browser and its version: 95.0a1 (2021-10-13) (64-bit)
- Operating system and its version: Windows 10


Steps to reproduce the problem:
1. Open form in pdf.js

What is the expected behavior? (add screenshot)
Form is blank (subform `nomin`  does not display)
What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/7104454/137184675-d48027c0-1f17-4faa-bc97-b45814b38e36.png)

subform `nomin` displays, even though it's subform is set to `<occur max="-1" min="0" />`

if (!this.emptyMerge) {
      return;
    }
    const { occur } = formNode;
    if (!occur || occur.initial <= 1) {
      return;
    }
    const parent = formNode[$getParent]();
    const name = formNode[$nodeName];
    if (!(parent[name] instanceof XFAObjectArray)) {
      return;
    }
    let currentNumber;
    if (formNode.name) {