Fixed guardian beam getting stuck on players (#540)

* Fixed guardian beam getting stuck on players

* Fixed formatting

connector/src/main/java/org/geysermc/connector/entity/living/monster/GuardianEntity.java

@@ -48,6 +48,8 @@ public class GuardianEntity extends MonsterEntity {
 
             if (entity != null) {
                 metadata.put(EntityData.TARGET_EID, entity.getGeyserId());
+            } else {
+                metadata.put(EntityData.TARGET_EID, (long) 0);
             }
         }