Add checks to prilen functions. #451

Job	Run time
mmg-debug / ci (ubuntu-20.04, on, off, on, off, int32_t)	37m 41s
mmg-debug / ci (ubuntu-20.04, on, off, off, off, int32_t)	49m 30s
mmg-debug / ci (ubuntu-20.04, off, off, on, off, int32_t)	33m 15s
mmg-debug / ci (ubuntu-20.04, off, off, off, off, int32_t)	39m 1s
mmg-debug / ci (macos-12, on, off, on, off, int32_t)	46m 30s
mmg-debug / ci (macos-12, on, off, off, off, int32_t)	1h 8m 32s
mmg-debug / ci (macos-12, off, off, on, off, int32_t)	31m 55s
mmg-debug / ci (macos-12, off, off, off, off, int32_t)	46m 47s
mmg-debug / ci (ubuntu-20.04, off, off, off, on, int32_t)	5m 52s
mmg-debug / ci (macos-12, off, off, off, on, int32_t)	3m 35s
mmg-debug / ci (ubuntu-20.04, off, on, on, off, int32_t)	34m 57s
mmg-debug / ci (macos-12, off, on, on, off, int32_t)	38m 6s
mmg-debug / ci (windows-2022, off, off, off, off, int32_t)	53m 10s
mmg-debug / ci (windows-2022, on, off, off, off, int32_t)	56m 15s
mmg-debug / ci (windows-2022, off, on, off, off, int32_t)	50m 10s
mmg-debug / ci (ubuntu-20.04, on, on, on, on, int64_t)	5m 27s
mmg-debug / ci (ubuntu-20.04, off, off, off, off, int64_t)	3m 29s
mmg-debug / ci (macos-12, on, on, on, on, int64_t)	13m 32s
mmg-debug / ci (macos-12, off, off, off, off, int64_t)	5m 28s
mmg-debug / ci (windows-2022, on, on, off, off, int64_t)	4m 40s
mmg-debug / ci (windows-2022, off, off, off, off, int64_t)	5m 37s
	10h 33m 29s

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