core: Stabilize the mem module

Excluding the functions inherited from the cast module last week (with marked
stability levels), these functions received the following treatment.

* size_of - this method has become #[stable]
* nonzero_size_of/nonzero_size_of_val - these methods have been removed
* min_align_of - this method is now #[stable]
* pref_align_of - this method has been renamed without the
  `pref_` prefix, and it is the "default alignment" now. This decision is in line
  with what clang does (see url linked in comment on function). This function
  is now #[stable].
* init - renamed to zeroed and marked #[stable]
* uninit - marked #[stable]
* move_val_init - renamed to overwrite and marked #[stable]
* {from,to}_{be,le}{16,32,64} - all functions marked #[stable]
* swap/replace/drop - marked #[stable]
* size_of_val/min_align_of_val/align_of_val - these functions are marked
  #[unstable], but will continue to exist in some form. Concerns have been
  raised about their `_val` prefix.

[breaking-change]

1 files changed, 3 insertions, 3 deletions

diff --git a/src/libnative/io/timer_unix.rs b/src/libnative/io/timer_unix.rs
index 2c5b7984827..ed218022b2e 100644
--- a/src/libnative/io/timer_unix.rs
+++ b/src/libnative/io/timer_unix.rs
@@ -87,17 +87,17 @@ pub enum Req {
 // returns the current time (in milliseconds)
 pub fn now() -> u64 {
     unsafe {
-        let mut now: libc::timeval = mem::init();
+        let mut now: libc::timeval = mem::zeroed();
         assert_eq!(c::gettimeofday(&mut now, ptr::null()), 0);
         return (now.tv_sec as u64) * 1000 + (now.tv_usec as u64) / 1000;
     }
 }
 
 fn helper(input: libc::c_int, messages: Receiver<Req>, _: ()) {
-    let mut set: c::fd_set = unsafe { mem::init() };
+    let mut set: c::fd_set = unsafe { mem::zeroed() };
 
     let mut fd = FileDesc::new(input, true);
-    let mut timeout: libc::timeval = unsafe { mem::init() };
+    let mut timeout: libc::timeval = unsafe { mem::zeroed() };
 
     // active timers are those which are able to be selected upon (and it's a
     // sorted list, and dead timers are those which have expired, but ownership