Validating data gives "in body" in errors

Hi! I want to validate data against non-swagger schemas. Everything is ok, except this line: https://github.com/go-openapi/validate/blob/master/schema.go#L75
Is there any recommendations how to change `in: "body"` to something that user can control?

For now, i just fork this repo and change `in: "body"` to `in: ""` to get less confusing error messages ;)