Fix signedness of scene yield params

According to the decompiled Lua code, they sometimes can return
negative numbers (like -1, to indicate an error.) I also improved
the debug display of these in the server log a bit.

src/bin/kawari-world.rs

@@ -874,7 +874,7 @@ async fn client_loop(
                                                 }
                                             }
                                             ClientZoneIpcData::EventHandlerReturn { handler_id, scene, error_code, num_results, params } => {
-                                                tracing::info!("Finishing this event... {handler_id} {error_code} {scene} {params:#?}");
+                                                tracing::info!("Finishing this event... {handler_id} {error_code} {scene} {:?}", &params[..*num_results as usize]);
 
                                                 connection
                                                 .event

src/ipc/zone/mod.rs

@@ -418,7 +418,7 @@ pub enum ClientZoneIpcData {
         scene: u16,
         error_code: u8,
         num_results: u8,
-        params: [u32; 2],
+        params: [i32; 2],
     },
     #[br(pre_assert(*magic == ClientZoneIpcType::Config))]
     Config(Config),

src/world/event.rs

@@ -86,7 +86,7 @@ impl Event {
         }
     }
 
-    pub fn finish(&mut self, scene: u16, results: &[u32], player: &mut LuaPlayer) {
+    pub fn finish(&mut self, scene: u16, results: &[i32], player: &mut LuaPlayer) {
         let mut run_script = || {
             self.lua.scope(|scope| {
                 let player = scope.create_userdata_ref_mut(player)?;