Exception for siege when slotting.

src/engine/objects/Mob.java

@@ -890,16 +890,12 @@ public class Mob extends AbstractIntelligenceAgent {
 
         if (this.building != null) {
 
-            // Siege mobiles don't have contracts.
-
-            if (this.contract == null) {
-
             // Mobiles inside buildings are offset from it not the zone
 
             this.bindLoc = new Vector3fImmutable(this.statLat, this.statAlt, this.statLon);
             this.bindLoc = this.building.getLoc().add(this.bindLoc);
 
-            } else
+            if (this.contract != null || this.isSiege)
                 NPCManager.slotCharacterInBuilding(this);
         }