revert changes due to NPE

Author: PrototypeTrousers

src/main/java/gregtech/common/metatileentities/electric/multiblockpart/MetaTileEntityFluidHatch.java

@@ -25,6 +25,7 @@
 import net.minecraft.util.NonNullList;
 import net.minecraft.util.ResourceLocation;
 import net.minecraft.world.World;
+import net.minecraftforge.fluids.FluidTank;
 import net.minecraftforge.fluids.IFluidTank;
 import net.minecraftforge.items.IItemHandlerModifiable;
 import net.minecraftforge.items.ItemStackHandler;
@@ -101,8 +102,8 @@ private int getInventorySize() {
     @Override
     protected void initializeInventory() {
         super.initializeInventory();
-        NotifiableFluidTank notifiableFluidTank = new NotifiableFluidTank(getInventorySize(),getController(),isExportHatch);
-        this.fluidTankHandler = new FluidTankList(false, notifiableFluidTank);
+        FluidTank fluidTank = new NotifiableFluidTank(getInventorySize(),getController(),isExportHatch);
+        this.fluidTankHandler = new FluidTankList(false, fluidTank);
         this.exportFluids = fluidTankHandler;
         this.importFluids = isExportHatch ? new FluidTankList(false) : fluidTankHandler;
         this.fluidInventory = fluidTankHandler;