Allow direct opening of another player's inventory

Not recommended - bugs may result, especially re: slot updates

By: md_5 <git@md-5.net>

paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftHumanEntity.java

@@ -324,6 +324,7 @@ public class CraftHumanEntity extends CraftLivingEntity implements HumanEntity {
                         customSize = Containers.GENERIC_9X3;
                         break;
                     case 36:
+                    case 41: // PLAYER
                         customSize = Containers.GENERIC_9X4;
                         break;
                     case 45: