Fix a client crash issue involving maps.

nms-patches/ContainerWorkbench.patch

@@ -1,5 +1,5 @@
---- ../work/decompile-8eb82bde//net/minecraft/server/ContainerWorkbench.java	2014-11-28 17:43:43.021707437 +0000
-+++ src/main/java/net/minecraft/server/ContainerWorkbench.java	2014-11-28 17:38:17.000000000 +0000
+--- ../work/decompile-8eb82bde//net/minecraft/server/ContainerWorkbench.java	2014-12-09 20:39:54.821706281 +0100
++++ src/main/java/net/minecraft/server/ContainerWorkbench.java	2014-12-09 20:39:42.000000000 +0100
 @@ -1,13 +1,28 @@
  package net.minecraft.server;
  
@@ -31,7 +31,7 @@
          this.g = world;
          this.h = blockposition;
          this.a((Slot) (new SlotResult(playerinventory.player, this.craftInventory, this.resultInventory, 0, 124, 35)));
-@@ -35,7 +50,18 @@
+@@ -35,7 +50,20 @@
      }
  
      public void a(IInventory iinventory) {
@@ -44,14 +44,16 @@
 +        if (super.listeners.size() < 1) {
 +            return;
 +        }
-+
++        if (craftResult != null && craftResult.getItem() == Items.FILLED_MAP) {
++            return;
++		 }
 +        EntityPlayer player = (EntityPlayer) super.listeners.get(0); // TODO: Is this _always_ correct? Seems like it.
 +        player.playerConnection.sendPacket(new PacketPlayOutSetSlot(player.activeContainer.windowId, 0, craftResult));
 +        // CraftBukkit end
      }
  
      public void b(EntityHuman entityhuman) {
-@@ -53,6 +79,7 @@
+@@ -53,6 +81,7 @@
      }
  
      public boolean a(EntityHuman entityhuman) {
@@ -59,7 +61,7 @@
          return this.g.getType(this.h).getBlock() != Blocks.CRAFTING_TABLE ? false : entityhuman.e((double) this.h.getX() + 0.5D, (double) this.h.getY() + 0.5D, (double) this.h.getZ() + 0.5D) <= 64.0D;
      }
  
-@@ -101,4 +128,17 @@
+@@ -101,4 +130,17 @@
      public boolean a(ItemStack itemstack, Slot slot) {
          return slot.inventory != this.resultInventory && super.a(itemstack, slot);
      }