Merge pull request #697 from zymex22/issue659

#659 fixed error on load by removen null bill billreport

Source/ProjectRimFactory/SAL3/Things/Assemblers/Building_ProgrammableAssembler.cs

@@ -245,7 +245,12 @@ public override void SpawnSetup(Map map, bool respawningAfterLoad)
             }
             prf_gamecomp.RegisterAssemblerQueue(this);
 
-
+            //Check if the Current Bill still Exists
+            if (currentBillReport.bill is null)
+            {
+                //Remove Bill
+                currentBillReport = null;
+            }
 
         }