null check for building owner.

src/engine/objects/NPC.java

@@ -240,9 +240,13 @@ public class NPC extends AbstractCharacter {
 				submitUpgradeJob();
 
 			this.name = rs.getString("npc_name");
-			if(this.building != null && this.building.getOwner().getObjectType().equals(GameObjectType.PlayerCharacter)){
+
+			// Name override for player owned npcs
+
+			if (this.building != null &&
+					this.building.getOwner() != null &&
+					this.building.getOwner().getObjectType().equals(GameObjectType.PlayerCharacter))
 				this.name += " the " + this.contract.getName();
-			}
 
 		}catch(Exception e){
 			Logger.error(e);