mark zero trait unsafe

sub/core/src/data.rs

@@ -46,7 +46,7 @@ pub fn distance(p1: impl As<usize>, p2: impl As<usize>) -> usize {
     }
 }
 
-pub trait Zeroed: Sized {
+pub unsafe trait Zeroed: Sized {
     #[inline(always)]
     fn zeroed() -> Self { unsafe { core::mem::zeroed() } }
 }