message: Fix environ signature
diff: @@ -42,7 +42,7 @@ pub const STDOUT_FILENO: c_int = 1;
  pub const STDERR_FILENO: c_int = 2;
  #[no_mangle]
  -pub static mut environ: *mut *mut c_char = ptr::null();
  +pub static mut environ: *mut *mut c_char = ptr::null_mut();
  #[no_mangle]
  pub extern "C" fn _exit(status: c_int) {
  