Orders: attack (fighting creatures nearby go for an enemy or enemy tower) and guard (up to three creatures hold a room for two minutes); right click with an order tool cancels

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/game.rs

@@ -1909,7 +1909,7 @@ impl Game {
         self.sfx(Sfx::DigDone, x as f32 + 0.5, y as f32 + 0.5);
     }
 
-    fn unreserve(&mut self, me: u32) {
+    pub(crate) fn unreserve(&mut self, me: u32) {
         for t in self.map.t.iter_mut() {
             if t.reserved == me {
                 t.reserved = 0;
@@ -3200,8 +3200,9 @@ impl Game {
                 }
             }
             Job::Guard(t) => {
+                // a guard post, or a guard order in any room
                 e.timer -= dt;
-                if cur != t || self.map.t[t].kind != Kind::GuardPost || e.timer <= 0.0 {
+                if cur != t || !self.map.t[t].walkable() || self.map.t[t].owner != Owner::Player || e.timer <= 0.0 {
                     self.unreserve(me);
                     e.job = Job::None;
                 }