Fix Queue dropping falsy items (#1190)

Author: lukasIO

.changeset/rare-dryers-rush.md

@@ -0,0 +1,5 @@
+---
+"@livekit/agents": patch
+---
+
+Fix Queue dropping falsy items

agents/src/utils.ts

@@ -101,7 +101,7 @@ export class Queue<T> {
         await once(this.#events, 'put');
       }
       let item = this.items.shift();
-      if (!item) {
+      if (typeof item === 'undefined') {
         item = await _get();
       }
       return item;