totalMatching is 0 in response if "skip" value > or = total matching contents

Description

Steps to reproduce

1. Send a request to search content. For example:

http://vnlabvm52:1000/api/episerver/v1.0/search/content?query=bears&skip=4

Note that the total matching contents are 4. And, it is equal to the "skip" value.

Expected:
No content is returned under "results", but totalMatching should still be 4.

Actual:
Results is null, and totalMatching is 0.