Error when reading property of JSON that may be null if not type is assigned.

[fofi]

I came across a bug where we try to read the properties of a possible null value when type is not assigned to the model.

It's not really a bug because type is not there, but it should not break.

var validator = require('is-my-json-valid')
var model = {
  oneOf: [
    {
      additionalProperties: false,
      properties: {
        name: {
          type: 'string',
          required: true
        }
      }
    }
  ]
}
var validate = validator(model)
validate(null)

      if (data.name === undefined) {
              ^

TypeError: Cannot read property 'name' of null

version: 2.16.1