Apply `repr(transparent)` to several FFI types

repr(transparent) is required in order to safely cast between an FFI
type and its NewType.  This commit applies that attribute to PollFd,
EpollEvent, IpMembershipRequest, Ipv6MembershipRequest, TimeVal, and
IoVec.

Fixes #1241

1 files changed, 2 insertions, 2 deletions

diff --git a/src/sys/socket/mod.rs b/src/sys/socket/mod.rs
index 1f627614..52768c93 100644
--- a/src/sys/socket/mod.rs
+++ b/src/sys/socket/mod.rs
@@ -278,7 +278,7 @@ cfg_if! {
 /// Request for multicast socket operations
 ///
 /// This is a wrapper type around `ip_mreq`.
-#[repr(C)]
+#[repr(transparent)]
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
 pub struct IpMembershipRequest(libc::ip_mreq);
 
@@ -297,7 +297,7 @@ impl IpMembershipRequest {
 /// Request for ipv6 multicast socket operations
 ///
 /// This is a wrapper type around `ipv6_mreq`.
-#[repr(C)]
+#[repr(transparent)]
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
 pub struct Ipv6MembershipRequest(libc::ipv6_mreq);