[BUG] Landing Gear will collide with ground even when retracted, resulting in explosion

[decaff42]

YSCE Build Number
Upstream, YSF 2015

System Specifications
N/A

Describe the bug
When landing gear are fully retracted, an aircraft will crash and explode if the gear positions defined in the DAT File intersect with the ground or another object.

To Reproduce

1. Takeoff
2. Retract Landing gear
3. Fly close to the ground
4. Explode

Expected behavior
When landing gear are retracted, they should not result in a collision or be used in collision calculation