Fixed crash when shift-clicking items

src/resonantinduction/battery/ContainerBattery.java

@@ -6,6 +6,7 @@ import net.minecraft.inventory.Container;
 import net.minecraft.inventory.ICrafting;
 import net.minecraft.inventory.Slot;
 import net.minecraft.item.ItemStack;
+import resonantinduction.api.IBattery;
 import resonantinduction.battery.BatteryManager.SlotBattery;
 import resonantinduction.battery.BatteryManager.SlotOut;
 
@@ -51,9 +52,9 @@ public class ContainerBattery extends Container
 			ItemStack itemstack1 = itemstack == null ? null : itemstack.copy();
 			inventoryItemStacks.set(slotID, itemstack1);
 
-			for (int j = 0; j < this.crafters.size(); ++j)
+			for (int j = 0; j < crafters.size(); ++j)
 			{
-				((ICrafting)this.crafters.get(j)).sendSlotContents(this, slotID, itemstack1);
+				((ICrafting)crafters.get(j)).sendSlotContents(this, slotID, itemstack1);
 			}
 		}
 		
@@ -73,4 +74,78 @@ public class ContainerBattery extends Container
 	{
         return tileEntity.isUseableByPlayer(entityplayer);
 	}
+	
+    @Override
+    public ItemStack transferStackInSlot(EntityPlayer player, int slotID)
+    {
+        ItemStack stack = null;
+        Slot currentSlot = (Slot)inventorySlots.get(slotID);
+
+        if(currentSlot != null && currentSlot.getHasStack())
+        {
+            ItemStack slotStack = currentSlot.getStack();
+            stack = slotStack.copy();
+            
+            if(slotID == 0 || slotID == 1)
+            {
+            	if(!mergeItemStack(slotStack, 4, inventorySlots.size(), true))
+            	{
+            		return null;
+            	}
+            }
+            else if(slotID == 2 || slotID == 3)
+            {
+            	if(!mergeItemStack(slotStack, 4, inventorySlots.size(), true))
+            	{
+            		return null;
+            	}
+            }
+            else if(slotStack.getItem() instanceof IBattery)
+            {
+            	if(!mergeItemStack(slotStack, 0, 1, false))
+            	{
+            		return null;
+            	}
+            }
+            else {
+	        	if(slotID >= 4 && slotID <= 30)
+	        	{
+	        		if(!mergeItemStack(slotStack, 31, inventorySlots.size(), false))
+	        		{
+	        			return null;
+	        		}
+	        	}
+	        	else if(slotID > 30)
+	        	{
+	        		if(!mergeItemStack(slotStack, 4, 30, false))
+	        		{
+	        			return null;
+	        		}
+	        	}
+	        	else {
+            		if(!mergeItemStack(slotStack, 4, inventorySlots.size(), true))
+            		{
+            			return null;
+            		}
+            	}
+            }
+            
+            if(slotStack.stackSize == 0)
+            {
+                currentSlot.putStack((ItemStack)null);
+            }
+            else {
+                currentSlot.onSlotChanged();
+            }
+
+            if(slotStack.stackSize == stack.stackSize)
+            {
+                return null;
+            }
+
+            currentSlot.onPickupFromSlot(player, slotStack);
+        }
+
+        return stack;
+    }
 }