Zero Length Raycasts/Sweeps not returning hits

Sweeps/Raycasts do not return hits for zero length queries.

This is a regression from 4.21, where zero length Sweeps/Raycasts correctly returned hits.

• Place a cube at the origin of a level.
• Perform a sweep/raycast with the start and end positions both at the origin.

Expected: Sweep/raycast returns a hit

Result: No hits are reported