clamping to or from 0 seems broken

[johrstrom]

We have this for the ascend cluster and given the steps below

form:
  - gpus
  - node_type
attributes:
  gpus:
    widget: number_field
    value: 0
    min: 0
    max: 4
  node_type:
    widget: select
    label: "Node type"
    help: |
      Need docs
    options:
      - [ 
          "cpu", "any",
          data-min-num-cores: 1,
          data-min-gpus: 0,
          data-max-gpus: 0,
          data-max-num-cores: 84,
          data-hide-gpus: true,
        ]
      - [ 
          "gpu", "gpu-any",
          data-min-gpus: 1,
          data-max-gpus: 4,
          data-min-num-cores: 1,
          data-max-num-cores: 88,
        ]

steps to reproduce:

• set the node_type to gpus
• set gpus to 0
• select node type cpu
• select node type gpu
• [bug] see that gpus is now set to 4 when it should have been set to 0.

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