MultipleOf with negative values - parser should throw error.

[SCSreekanth]

Please take a look at the below openapi content.

openapi: 3.0.1
info:
  title: Swagger Petstore
  description: 'This is a sample server Petstore server'
  version: 1.0.0
servers:
  - url: http://mytestServer/{v1}
    variables:
      v2:
        default: 'd'
paths:
  '/pet/{petId}':
    get:
      summary: Find pet by ID
      description: Returns a single pet
      parameters:
        - name: petId
          in: path
          description: ID of pet to return
          required: true
          schema:
            type : integer
            multipleOf: -10
      responses:
        '200':
          description: successful operation

The multipleOf attribute has a negative value. Swagger Editor throws this error but the parser doesn't. Can this be fixed? Thanks

Regards,
Sree