Fix world loading stalling when a disk drive is present

src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/node/diskdrive/DiskDriveNetworkNode.java

@@ -90,9 +90,11 @@ public class DiskDriveNetworkNode extends NetworkNode implements IStorageProvide
                     network.getFluidStorageCache().invalidate();
                 }
 
+                if (!isReading()) {
                     WorldUtils.updateBlock(world, pos);
                 }
             }
+        }
     };
 
     private BaseItemHandler itemFilters = new BaseItemHandler(9, new NetworkNodeListener(this));

src/main/java/com/raoulvdberge/refinedstorage/inventory/item/BaseItemHandler.java

@@ -71,4 +71,8 @@ public class BaseItemHandler extends ItemStackHandler {
     public void setReading(boolean reading) {
         this.reading = reading;
     }
+
+    public boolean isReading() {
+        return reading;
+    }
 }