Update code to current post-10 branch

Cargo.lock

@@ -1,3 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
 [[package]]
 name = "array-init"
 version = "0.0.3"

src/vga_buffer.rs

@@ -39,6 +39,7 @@ pub enum Color {
 
 /// A combination of a foreground and a background color.
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
+#[repr(transparent)]
 struct ColorCode(u8);
 
 impl ColorCode {
@@ -62,6 +63,7 @@ const BUFFER_HEIGHT: usize = 25;
 const BUFFER_WIDTH: usize = 80;
 
 /// A structure representing the VGA text buffer.
+#[repr(transparent)]
 struct Buffer {
     chars: [[Volatile<ScreenChar>; BUFFER_WIDTH]; BUFFER_HEIGHT],
 }