Fix build errors converting and comparing to int. (#4633) #1957

Job	Run time
macOS [UBSAN] [lmdb \| clang]	33m 31s
Linux [UBSAN] [lmdb \| clang]	38m 18s
macOS [ASAN] [lmdb \| clang]	28m 40s
macOS [TSAN] [lmdb \| clang]	31m 33s
Linux [ASAN] [lmdb \| clang]	37m 37s
Linux [ASAN_INT] [lmdb \| clang] (Errors Ignored)	37m 58s
macOS [UBSAN] [rocksdb \| clang]	39m 43s
Linux [TSAN] [lmdb \| clang]	39m 6s
macOS [ASAN] [rocksdb \| clang]	35m 50s
macOS [TSAN] [rocksdb \| clang]	47m 34s
Linux [LEAK] [lmdb \| clang] (Errors Ignored)	37m 11s
Linux [UBSAN] [rocksdb \| clang]	43m 34s
Linux [ASAN] [rocksdb \| clang]	51m 48s
Linux [ASAN_INT] [rocksdb \| clang] (Errors Ignored)	49m 46s
Linux [LEAK] [rocksdb \| clang] (Errors Ignored)	47m 44s
	9h 59m 53s

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