mark pin_init::zeroed and Zeroable::zeroed as #[inline]

The `pin_init::zeroed` function is a trivial wrapper around
`unsafe { core::mem::zeroed() }`, whereas `Zeroable::zeroed` is a
trivial wrapper around `pin_init::zeroed`. Mark them both as `#[inline]`
to avoid generating unnecessary symbols for them.

Signed-off-by: Nicolás Antinori <nico.antinori.7@gmail.com>

Author: nicoan

src/lib.rs

@@ -1557,6 +1557,7 @@ pub unsafe trait Zeroable {
     /// assert_eq!(point.x, 0);
     /// assert_eq!(point.y, 0);
     /// ```
+    #[inline]
     fn zeroed() -> Self
     where
         Self: Sized,
@@ -1603,6 +1604,7 @@ pub fn init_zeroed<T: Zeroable>() -> impl Init<T> {
 /// assert_eq!(point.x, 0);
 /// assert_eq!(point.y, 0);
 /// ```
+#[inline]
 pub const fn zeroed<T: Zeroable>() -> T {
     // SAFETY:By the type invariants of `Zeroable`, all zeroes is a valid bit pattern for `T`.
     unsafe { core::mem::zeroed() }