Display inconsistency fix

[MillionthOdin16]

@WillFP
Finally found source of display bug that causes enchants to not appear and armor tiers to display as %tier%. Usually the PacketWindowItems onSend is called once per event, but sometimes it's called an additional 3 times with the windowId set to 0. This infrequent case caused the display to break because player.lastDisplayFrame was not set to empty during those additional calls. I also fixed a packet type that I think you intended to use in PacketHeldWindowItems.

I've tested this on 1.19.2 with displayframes set to true, and it works without any issues that I can see. Small bug XD

This should resolve Auxilor/EcoEnchants#299 and resolve Auxilor/EcoEnchants#303

Let me know if you want me to get any more debug info

[MillionthOdin16]

Just fyi. I just saw a console error for the HeldItemSlot packet. I'm about to goto bed so I'll look at it tomorrow. I didn't run into any in game issues, but error not good. You prob know how to fix anyways. This packet was sent on player join

com.comphenix.protocol.reflect.FieldAccessException: Field index 0 is out of bounds for length 0
        at com.comphenix.protocol.reflect.FieldAccessException.fromFormat(FieldAccessException.java:49) ~[ProtocolLib.jar:?]
        at com.comphenix.protocol.reflect.StructureModifier.read(StructureModifier.java:218) ~[ProtocolLib.jar:?]
        at com.comphenix.protocol.reflect.StructureModifier.modify(StructureModifier.java:320) ~[ProtocolLib.jar:?]
        at com.willfp.eco.internal.spigot.display.PacketHeldWindowItems.onSend(PacketHeldWindowItems.kt:19) ~[eco-6.41.1-all.jar:?]
        at com.willfp.eco.core.AbstractPacketAdapter.onPacketSending(AbstractPacketAdapter.java:119) ~[eco-6.41.1-all.jar:?]
        at com.comphenix.protocol.injector.SortedPacketListenerList.invokeSendingListener(SortedPacketListenerList.java:195) ~[ProtocolLib.jar:?]
        at com.comphenix.protocol.injector.SortedPacketListenerList.invokePacketSending(SortedPacketListenerList.java:149) ~[ProtocolLib.jar:?]
        at com.comphenix.protocol.injector.PacketFilterManager.postPacketToListeners(PacketFilterManager.java:547) ~[ProtocolLib.jar:?]```