Fixed an error & updated Bukkit

src/main/java/com/lishid/openinv/internal/SpecialPlayerInventory.java

@@ -140,7 +140,7 @@ public class SpecialPlayerInventory extends PlayerInventory {
                 is[i] = null;
                 return itemstack;
             } else {
-                itemstack = is[i].a(j);
+                itemstack = is[i].cloneAndSubtract(j);
                 if (is[i].count == 0) {
                     is[i] = null;
                 }

src/main/resources/plugin.yml

@@ -1,6 +1,6 @@
 name: OpenInv
 main: com.lishid.openinv.OpenInv
-version: 2.3.3
+version: 2.3.4
 author: lishid
 description: >
              This plugin allows you to open a player's inventory as a chest and interact with it in real time.