Fix lzma compression level #731 #347

Job	Run time
Ubuntu 20 GCC	57s
Ubuntu GCC ASAN	4m 48s
Ubuntu GCC UBSAN	3m 28s
Ubuntu GCC MSAN	1m 30s
Ubuntu 20 Clang	1m 3s
Ubuntu 20 Clang 6.0	1m 24s
Ubuntu GCC	1m 5s
Ubuntu GCC OSB	1m 3s
Ubuntu Clang	1m 31s
Ubuntu Clang No Zlib	1m 8s
Ubuntu Clang No Bzip2	1m 6s
Ubuntu Clang No LZMA	1m 18s
Ubuntu Clang No Zstd	1m 38s
Ubuntu Clang No Pkcrypt	1m 22s
Ubuntu Clang No Winzip AES	1m 6s
Ubuntu Clang No Encryption	49s
Ubuntu Clang Compress Only	1m 4s
Ubuntu Clang Decompress Only	1m 2s
Ubuntu Clang OpenSSL	1m 9s
Windows MSVC	5m 2s
Windows GCC Code Coverage	8m 32s
macOS Xcode	2m 24s
macOS Xcode Code Coverage	2m 29s
macOS Xcode LibCompression	2m 25s
macOS Xcode OpenSSL	2m 14s
	51m 37s

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