Use repr(transparent) for bitflags.

Author: qwandor

src/macros.rs

@@ -64,6 +64,7 @@ macro_rules! libc_bitflags {
     ) => {
         ::bitflags::bitflags! {
             #[derive(Copy, Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
+            #[repr(transparent)]
             $(#[$outer])*
             pub struct $BitFlags: $T {
                 $(

src/sys/statvfs.rs

@@ -12,7 +12,6 @@ use crate::{errno::Errno, NixPath, Result};
 #[cfg(not(target_os = "redox"))]
 libc_bitflags!(
     /// File system mount Flags
-    #[repr(C)]
     #[derive(Default)]
     pub struct FsFlags: c_ulong {
         /// Read Only