Fixes #2043: Storage buses updates should happen in the correct order.

This is loosely based on #2032 and should prevent any duplicated event,
but still does a refresh the whole cache due to potentially issues with
some inventories.

It also ensures that storage buses will not announce a CellArrayUpdate
before they are fully initialized, thus no longer causing them to return
null during an update.

Fixes #2403

src/main/java/appeng/parts/misc/PartStorageBus.java

@@ -408,16 +408,6 @@ public class PartStorageBus extends PartUpgradeable implements IGridTickable, IC
 			return this.handler;
 		}
 
-		try
-		{
-			// force grid to update handlers...
-			this.getProxy().getGrid().postEvent( new MENetworkCellArrayUpdate() );
-		}
-		catch( final GridAccessException e )
-		{
-			// :3
-		}
-
 		this.handlerHash = newHandlerHash;
 		this.handler = null;
 		this.monitor = null;
@@ -500,6 +490,16 @@ public class PartStorageBus extends PartUpgradeable implements IGridTickable, IC
 			}
 		}
 
+		try
+		{
+			// force grid to update handlers...
+			this.getProxy().getGrid().postEvent( new MENetworkCellArrayUpdate() );
+		}
+		catch( final GridAccessException e )
+		{
+			// :3
+		}
+
 		return this.handler;
 	}