problems with arrays in form for C client generation

arrayinform.yaml

openapi: 3.0.0
info:
  title: Skycoin REST API.
  version: 0.25.1
paths:
  /api/v1/wallet/transaction:
    post:
      description: Creates a signed transaction
      operationId: walletTransaction
      requestBody:
        content:
          application/x-www-form-urlencoded:
            schema:
              properties:
                to:
                  items:
                    properties:
                      address:
                        type: string
                  type: array
        required: true
      responses:
        "200":
          description: Returns blocks between a start and end point.
servers:
  - url: http://127.0.0.1:6420/
  - url: https://127.0.0.1:6420/