Import 39ef490039: Updated fallthrough attribute to Cmake compatible (by Maki)

[daleglass]

This is an automated proposal to look at a commit made by Maki and import it into Overte

Commit:	39ef490039f57698d742f2031e0628915d0ace83
Author:	Maki
Date:	Sat, 25 Apr 2020 18:59

Updated fallthrough attribute to Cmake compatible

Stats:

Filename	Stats	Lines	Added	Removed	Lines in blame
interface/src/ui/OctreeStatsDialog.cpp		5	3	2	3
1 files	-	5	3	2	3

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