Removed muffler from Vacuum Freezer. (#2439)

src/main/java/gregtech/common/tileentities/machines/multi/GT_MetaTileEntity_VacuumFreezer.java

@@ -1,18 +1,28 @@
 package gregtech.common.tileentities.machines.multi;
 
+import static gregtech.api.enums.GT_HatchElement.Energy;
+import static gregtech.api.enums.GT_HatchElement.InputBus;
+import static gregtech.api.enums.GT_HatchElement.InputHatch;
+import static gregtech.api.enums.GT_HatchElement.Maintenance;
+import static gregtech.api.enums.GT_HatchElement.OutputBus;
+import static gregtech.api.enums.GT_HatchElement.OutputHatch;
 import static gregtech.api.enums.Textures.BlockIcons.OVERLAY_FRONT_VACUUM_FREEZER;
 import static gregtech.api.enums.Textures.BlockIcons.OVERLAY_FRONT_VACUUM_FREEZER_ACTIVE;
 import static gregtech.api.enums.Textures.BlockIcons.OVERLAY_FRONT_VACUUM_FREEZER_ACTIVE_GLOW;
 import static gregtech.api.enums.Textures.BlockIcons.OVERLAY_FRONT_VACUUM_FREEZER_GLOW;
 import static gregtech.api.enums.Textures.BlockIcons.casingTexturePages;
 
+import java.util.List;
+
 import net.minecraft.item.ItemStack;
 import net.minecraftforge.common.util.ForgeDirection;
 
+import com.google.common.collect.ImmutableList;
 import com.gtnewhorizon.structurelib.structure.IStructureElement;
 import com.gtnewhorizon.structurelib.structure.StructureUtility;
 
 import gregtech.api.GregTech_API;
+import gregtech.api.interfaces.IHatchElement;
 import gregtech.api.interfaces.ITexture;
 import gregtech.api.interfaces.metatileentity.IMetaTileEntity;
 import gregtech.api.interfaces.tileentity.IGregTechTileEntity;
@@ -111,6 +121,11 @@ protected IStructureElement<GT_MetaTileEntity_CubicMultiBlockBase<?>> getCasingE
         return StructureUtility.ofBlock(GregTech_API.sBlockCasings2, 1);
     }
 
+    @Override
+    protected List<IHatchElement<? super GT_MetaTileEntity_CubicMultiBlockBase<?>>> getAllowedHatches() {
+        return ImmutableList.of(InputHatch, OutputHatch, InputBus, OutputBus, Maintenance, Energy);
+    }
+
     @Override
     protected int getHatchTextureIndex() {
         return 17;