Fixed a compile error when UFE_SCENE_SEGMENT_SUPPORT isn't available.

[jjzanin-SMS]

I'm not sure if this is the correct fix, but there is a compile error when the header file "ufe/sceneSegmentHandler.h" isn't available. I'm assuming it's because our studio is using Maya 2023 and this feature is available in the next version.

[seando-adsk]

@jjzanin-SMS Thank you for submitting a pull-request to fix this. I believe the problem here is that that sceneSegmentHandler.h file was added to Ufe v3.2 which was integrated into Maya 2023.2. I guess you are building with an earlier version of Maya 2023. Sorry we should have caught this earlier.

However in order to accept this pull-request we will need to have a signed CLA. Please see https://github.com/Autodesk/maya-usd/blob/dev/doc/CONTRIBUTING.md.

Sean

[jjzanin-SMS]

Interesting, we are on 2023.3.0-14.0.PFIX. I assume that should have the new header file. I'll ask around to see why our include files aren't being updated.

I'll also talk to my lead about the CLA. Thanks!

[seando-adsk]

Ufe is part of the Maya devkit. So you probably just need to download the devkit for Maya 2023.3