Use std::os::raw::c_int and remove our own type alias #681

Job	Run time
clippy	22s
msrv (ubuntu-latest, 1.63)	1m 18s
msrv (windows-latest, 1.63)	1m 22s
cross (ubuntu-latest)	2m 39s
cross (macos-latest)	3m 2s
fmt	17s
security_audit	2m 26s
wine	2m 17s
test (ubuntu-latest, nightly)	1m 47s
test (ubuntu-latest, beta)	1m 31s
test (ubuntu-latest, stable)	1m 43s
test (windows-latest, nightly)	1m 45s
test (windows-latest, beta)	1m 31s
test (windows-latest, stable)	1m 34s
test (macos-latest, nightly)	2m 34s
test (macos-latest, beta)	55s
test (macos-latest, stable)	2m 27s
test (windows-latest, nightly-x86_64-pc-windows-gnu)	1m 42s
test (windows-latest, nightly-i686-pc-windows-msvc)	1m 50s
test (windows-latest, nightly-i686-pc-windows-gnu)	1m 50s
	34m 52s

Provide feedback