additionalProperties problem

Hi! It is the best JSON validator I have tried. :-) Thanks for your job.

I found some strange behaviour and wrote the test case in PR.
When I add `aditionalProperties` and `properties` fields in schema, some errors after validation disappears.

UPD: 
In the first test I have `OBJECT_ADDITIONAL_PROPERTIES` and `OBJECT_PROPERTIES_MINIMUM` errors. But there is only one error `OBJECT_ADDITIONAL_PROPERTIES` in the second.