Fix fission port item capability

Author: igentuman

src/main/java/igentuman/nc/block/entity/fission/FissionPortBE.java

@@ -138,7 +138,7 @@ protected FluidCapabilityHandler fluidHandler()
     public <T> LazyOptional<T> getCapability(@Nonnull Capability<T> cap, @Nullable Direction side) {
         if (controller() == null) return super.getCapability(cap, side);
         if (cap == ForgeCapabilities.ITEM_HANDLER) {
-            return controller().contentHandler().itemCapability.cast();
+            return controller().getCapability(cap, side);
         }
         if (cap == ForgeCapabilities.FLUID_HANDLER && controller().canAcceptFluid()) {
             return controller().getCapability(cap, side);

src/main/java/igentuman/nc/container/FissionPortContainer.java

@@ -22,8 +22,8 @@
 import static igentuman.nc.NuclearCraft.MODID;
 
 public class FissionPortContainer extends AbstractContainerMenu {
-    protected FissionPortBE portBE;
-    protected Player playerEntity;
+    protected final FissionPortBE portBE;
+    protected final Player playerEntity;
 
 
     protected String name = "fission_reactor_port";
@@ -40,8 +40,6 @@ public FissionPortContainer(int pContainerId, BlockPos pos, Inventory playerInve
         layoutPlayerInventorySlots();
         portBE.getCapability(ForgeCapabilities.ITEM_HANDLER).ifPresent(h -> {
             addSlot(new NCSlotItemHandler.Input(h, 0, 56, 35));
-        });
-        portBE.getCapability(ForgeCapabilities.ITEM_HANDLER).ifPresent(h -> {
             addSlot(new NCSlotItemHandler.Output(h, 1, 116, 35));
         });
     }
@@ -97,7 +95,6 @@ public Component getTitle() {
         return Component.translatable("block."+MODID+"."+name);
     }
 
-
     private void addSlotRange(IItemHandler handler, int x, int y, int amount, int dx) {
         for (int i = 0 ; i < amount ; i++) {
             addSlot(new SlotItemHandler(handler, slotIndex, x, y));
@@ -120,6 +117,7 @@ protected void layoutPlayerInventorySlots() {
         topRow -= 58;
         addSlotBox(playerInventory, leftCol, topRow, 9, 18, 3, 18);
     }
+
     public int getEnergy() {
         return portBE.getEnergyStored();
     }