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" />`

this._setProperties(formNode, dataNode);
    this._bindItems(formNode, dataNode);
    this._bindElement(formNode, dataNode);
  }
  _bindElement(formNode, dataNode) {
    
    
    const uselessNodes = [];
    this._createOccurrences(formNode);
    for (const child of formNode[$getChildren]()) {
      if (child[$data]) {
        
        continue;
      }
      if (this._mergeMode === undefined && child[$nodeName] === "subform") {
        this._mergeMode = child.mergeMode === "consumeData";
        
        
        
        
        const dataChildren = dataNode[$getChildren]();
        if (dataChildren.length > 0) {
          this._bindOccurrences(child, [dataChildren[0]], null);
        } else if (this.emptyMerge) {
          const nsId =
            dataNode[$namespaceId] === NS_DATASETS
              ? -1
              : dataNode[$namespaceId];