update for new RLTK version

src/main.rs

@@ -1,4 +1,4 @@
-use rltk::{Console, GameState, Point, Rltk, VirtualKeyCode, RGB};
+use rltk::{GameState, Point, Rltk, VirtualKeyCode, RGB};
 use specs::prelude::*;
 use std::cmp::{max, min};
 mod rect;
@@ -135,11 +135,11 @@ pub fn draw_map(ecs: &World, ctx: &mut Rltk) {
     }
 }
 
-fn main() {
+fn main() -> rltk::BError {
     use rltk::RltkBuilder;
     let context = RltkBuilder::simple80x50()
         .with_title("Roguelike Tutorial")
-        .build();
+        .build()?;
     let mut gs = State {
         ecs: World::new(),
         runstate: RunState::Running,
@@ -180,7 +180,7 @@ fn main() {
 
     for (idx, room) in map.rooms.iter().skip(1).enumerate() {
         let (x, y) = room.center();
-        let (glyph, name): (u8, String) = match rng.roll_dice(1, 2) {
+        let (glyph, name): (u16, String) = match rng.roll_dice(1, 2) {
             1 => (rltk::to_cp437('g'), "Goblin".to_string()),
             _ => (rltk::to_cp437('o'), "Orc".to_string()),
         };
@@ -207,5 +207,5 @@ fn main() {
     gs.ecs.insert(map);
     gs.ecs.insert(Point::new(player_x, player_y));
 
-    rltk::main_loop(context, gs);
+    rltk::main_loop(context, gs)
 }