Vessel/kerbal destroyed when approaching low-altitude regions of Drast

### Steps to reproduce
1. Go to Drast
2. Attempt to land on any low-altitude region
3. Observe

### Observed
Vessel is destroyed at 0m sea level

### Expected
Vessel should not be destroyed above ground

### Additional Notes


**Game version**: 0.2.3.0.102654-internal (commit cf771bdc)<br/>
**Internal tracker issue**: #800