Update rrt0 and remove the empty loop (#45)

* Update rrt0 and remove the empty loop

- Allows the rrt0 start function to panic when main returns
- Fixes undefined behavior
- See: rust-lang/rust#28728

* Fix link in doc comment

Author: parasyte

Cargo.lock

@@ -18,7 +18,4 @@ fn main() {
 
     ipl3font::draw_str_centered(WHITE, "Hello, world!");
     vi::swap_buffer();
-
-    #[allow(clippy::empty_loop)]
-    loop {}
 }

examples/hello-ipl3font/src/main.rs

@@ -1,7 +1,7 @@
 //! IPL3 font renderer.
 //!
 //! Draws strings using the font embedded in the official Nintendo IPL3 bootcode.
-//! See: https://github.com/PeterLemon/N64/blob/master/BOOTCODE/IPL3Font.asm
+//! See: <https://github.com/PeterLemon/N64/blob/master/BOOTCODE/IPL3Font.asm>
 
 use crate::vi;