Fix inverted conditions in count_(leading|trailing)_zeros for 64-bit … #414

Job	Run time
Test (ubuntu-24.04, aarch64-linux-android, x86_64-unknown-linux-gnu)	7m 43s
cargo-deny	54s
Lint	5m 37s
Test (macOS-latest, x86_64-apple-darwin)	14m 8s
Test (windows-2022, x86_64-pc-windows-msvc)	28m 9s
Test (ubuntu-24.04, x86_64-unknown-linux-gnu)	15m 41s
test_success	3s
	1h 12m 15s

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