message: Fix garbage env pointer to main on redox
diff: @@ -63,10 +63,7 @@ impl Stack {
  #[no_mangle]
  pub unsafe extern "C" fn _start_rust(sp: &'static Stack) -> ! {
  extern "C" {
  - #[cfg(not(target_os = "redox"))]
  fn main(argc: isize, argv: *const *const c_char, envp: *const *const c_char) -> c_int;
  - #[cfg(target_os = "redox")]
  - fn main(argc: isize, argv: *const *const c_char) -> c_int;
  }
  let argc = sp.argc();
  @@ -119,6 +116,7 @@ pub unsafe extern "C" fn _start_rust(sp: &'static Stack) -> ! {
  platform::exit(main(
  argc,
  argv as *const *const c_char,
  + platform::environ as *const *const c_char
  ));
  }
  