engineResetModelLODDistance on some non existent models causes client crash

[StifflersMom]

Describe the bug
engineResetModelLODDistance on some non existent models causes client crash

To reproduce

crun engineResetModelLODDistance(20000)

Expected behaviour

no crash :)

Screenshots

Version

Version = 1.5.9-release-21005.0.000

Additional context

[patrikjuvonen]

See #837, #446, and #299

[Fernando-A-Rocha]

can be closed ^ :)

[patrikjuvonen]

Continue at #837