Crosspost: 'hmddbg showcamera on' crashes editor on exit

Hi there,

with 'hmddbg showcamera on' it's possible to see the tracker's view frustum in VR mode. If this is active when exiting PIE session, it crashes the whole editor.

It's also not possible to just deactivate this by deactivating this automatically on end, there is no bindable event like 'onExitGame' exposed for blueprint.

Oculus SDK: 0.6.0.1

Crash log:

*MachineId:09466ED14773200D475C1E8762FE17BF
EpicAccountId:fba125fe5ed14161aba1305f0b491147
Access violation - code c0000005 (first/second chance not available)
""
UE4Editor_Core!FRotator::Quaternion()
UE4Editor_OculusRift!FHeadMountedDisplay::DrawDebugTrackingCameraFrustum()
UE4Editor_OculusRift!FOculusRiftHMD::DrawDebug()
UE4Editor_Engine!UGameViewportClient::Draw()
UE4Editor_Engine!FViewport::Draw()
UE4Editor_Engine!FSceneViewport::ResizeViewport()
UE4Editor_Engine!FSceneViewport::SetViewportSize()
UE4Editor_OculusRift!FOculusRiftHMD::DoEnableStereo()
UE4Editor_OculusRift!FOculusRiftHMD::OnEndPlay()
UE4Editor_UnrealEd!UEditorEngine::EndPlayMap()
UE4Editor_UnrealEd!UEditorEngine::Tick()
UE4Editor_UnrealEd!UUnrealEdEngine::Tick()
UE4Editor!FEngineLoop::Tick()
UE4Editor!GuardedMain()
UE4Editor!GuardedMainWrapper()
UE4Editor!WinMain() *

spyro