Avoid switching 2nd and 3rd triangle vertices #594

Job	Run time
mmg-debug / ci (ubuntu-20.04, on, off, on, off, int32_t)	38m 46s
mmg-debug / ci (ubuntu-20.04, on, off, off, off, int32_t)	47m 0s
mmg-debug / ci (ubuntu-20.04, off, off, on, off, int32_t)	33m 18s
mmg-debug / ci (ubuntu-20.04, off, off, off, off, int32_t)	41m 4s
mmg-debug / ci (macos-12, on, off, on, off, int32_t)	48m 0s
mmg-debug / ci (macos-12, on, off, off, off, int32_t)	1h 20m 7s
mmg-debug / ci (macos-12, off, off, on, off, int32_t)	43m 8s
mmg-debug / ci (macos-12, off, off, off, off, int32_t)	55m 2s
mmg-debug / ci (ubuntu-20.04, off, off, off, on, int32_t)	5m 19s
mmg-debug / ci (macos-12, off, off, off, on, int32_t)	11m 15s
mmg-debug / ci (ubuntu-20.04, off, on, on, off, int32_t)	35m 21s
mmg-debug / ci (macos-12, off, on, on, off, int32_t)	27m 54s
mmg-debug / ci (windows-2022, off, off, off, off, int32_t)	50m 4s
mmg-debug / ci (windows-2022, on, off, off, off, int32_t)	49m 43s
mmg-debug / ci (windows-2022, off, on, off, off, int32_t)	50m 48s
mmg-debug / ci (ubuntu-20.04, on, on, on, on, int64_t)	6m 24s
mmg-debug / ci (ubuntu-20.04, off, off, off, off, int64_t)	4m 12s
mmg-debug / ci (macos-12, on, on, on, on, int64_t)	12m 2s
mmg-debug / ci (macos-12, off, off, off, off, int64_t)	5m 22s
mmg-debug / ci (windows-2022, on, on, off, off, int64_t)	5m 14s
mmg-debug / ci (windows-2022, off, off, off, off, int64_t)	5m 7s
	10h 55m 10s

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