Min distance can exceed max distance when set through the script in 3D sound settings of Audio Source.

Steps to Reproduce:
- Create a new project.
- Add attached unity package(RolloffMinMax).
- Play RollOff Scene
- Enter higher value in MinDistance(than Max Distance)

Note: Min Distance exceeds max distance.

Expected Result: There should be a warning or min/max values should be adjusted automatically as it is handled when we set values through the editor.

Reproducible On: 2018.1.0b1 , 2017.3.0f3 , 2017.2.0f3, 5.6.4f1

Frequency: Always

Notes:
- Reproducible on both Mac and Windows.