Fix SockaddrLike::len on non-BSD

Author: asomers

src/sys/socket/addr.rs

@@ -1037,7 +1037,7 @@ pub trait SockaddrLike: private::SockaddrLikePriv {
                 // No robust default implementation is possible without an
                 // sa_len field.  Implementors with a variable size must
                 // override this method.
-                mem::size_of_val(&self) as libc::socklen_t
+                mem::size_of_val(self) as libc::socklen_t
             }
         }
     }