Update to protection check.

src/engine/loot/WorkOrder.java

@@ -22,6 +22,7 @@ import java.time.Instant;
 import java.time.LocalDateTime;
 import java.time.ZoneId;
 import java.util.ArrayList;
+import java.util.EnumSet;
 import java.util.HashMap;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.Delayed;
@@ -150,7 +151,7 @@ public class WorkOrder implements Delayed {
         // Forge must be protected in order to access warehouse.
 
         if (ForgeManager.calcProductionCost(workOrder).size() > 1)
-            if (!workOrder.vendor.building.protectionState.equals(mbEnums.ProtectionState.PROTECTED))
+            if (!EnumSet.of(mbEnums.ProtectionState.PROTECTED, mbEnums.ProtectionState.CONTRACT).contains(workOrder.vendor.building.protectionState))
                 return 193;     //193: Production denied: This building must be protected to gain access to warehouse
 
         return validation_result;