fix bug in function is_64bit() #1699

Job	Run time
Test slow test cases	53s
Test on aarch64	7m 57s
Test Python 3.8 on ubuntu-22.04	1m 5s
Test Python 3.9 on ubuntu-22.04	2m 16s
Test Python 3.10 on ubuntu-22.04	1m 8s
Test Python 3.11 on ubuntu-22.04	1m 1s
Test Python 3.12 on ubuntu-22.04	1m 40s
Test Python pypy-3.9 on ubuntu-22.04	1m 51s
Test Python 3.8 on windows-latest	2m 11s
Test Python 3.9 on windows-latest	2m 26s
Test Python 3.10 on windows-latest	2m 16s
Test Python 3.11 on windows-latest	2m 20s
Test Python 3.12 on windows-latest	2m 19s
Test Python 3.11 on macos-latest	1m 18s
finish parallel build	0s
	30m 41s

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