Cancel force-settlement order when offset is 100%

Author: abitmore

libraries/chain/db_update.cpp

@@ -379,6 +379,13 @@ void database::clear_expired_orders()
             cancel_settle_order(order);
             continue;
          }
+         if( GRAPHENE_100_PERCENT == mia.options.force_settlement_offset_percent ) // settle something for nothing
+         {
+            ilog( "Canceling a force settlement in ${asset} because settlement offset is 100%",
+                  ("asset", mia_object.symbol));
+            cancel_settle_order(order);
+            continue;
+         }
          if( max_settlement_volume.asset_id != current_asset )
             max_settlement_volume = mia_object.amount(mia.max_force_settlement_volume(mia_object.dynamic_data(*this).current_supply));
          // When current_asset_finished is true, this would be the 2nd time processing the same order.