Fix typo from aeac055

Author: asomers

src/sys/socket/ffi.rs

@@ -4,8 +4,11 @@
 pub use libc::{socket, listen, bind, accept, connect, setsockopt, sendto, recvfrom, getsockname, getpeername, recv, send};
 
 use libc::{c_int, c_void, socklen_t, size_t, ssize_t};
-use sys::uio::IoVec;
 
+#[cfg(target_os = "macos")]
+use libc::c_uint;
+
+use sys::uio::IoVec;
 
 #[cfg(target_os = "linux")]
 pub type type_of_cmsg_len = size_t;
@@ -15,7 +18,7 @@ pub type type_of_cmsg_len = socklen_t;
 
 // OSX always aligns struct cmsghdr as if it were a 32-bit OS
 #[cfg(target_os = "macos")]
-pub type type_of_cmsg_data = uint32_t;
+pub type type_of_cmsg_data = c_uint;
 
 #[cfg(not(target_os = "macos"))]
 pub type type_of_cmsg_data = size_t;