error handling for position

src/sprite.rs

@@ -60,7 +60,7 @@ impl From<String> for Sprite {
                     panic!("Bad room/position for sprite: {}", string);
                 }
 
-                position = Some(Position::from(room_position[1].to_string()));
+                position = Some(Position::from(room_position[1].to_string()).unwrap());
             } else if last_line.starts_with("COL") {
                 colour_id = Some(last_line.replace("COL ", "").parse().unwrap());
             } else {