Fix some potential NPE problems.

src/main/java/mekanism/common/recipe/inputs/AdvancedMachineInput.java

@@ -61,13 +61,16 @@ public class AdvancedMachineInput extends MachineInput<AdvancedMachineInput>
 	@Override
 	public int hashIngredients()
 	{
-		int hash = StackUtils.hashItemStack(itemStack) << 8 | gasType.getID();
-		return hash;
+		return StackUtils.hashItemStack(itemStack) << 8 | gasType.getID();
 	}
 
 	@Override
 	public boolean testEquality(AdvancedMachineInput other)
 	{
+		if(!isValid())
+		{
+			return !other.isValid();
+		}
 		return StackUtils.equalsWildcardWithNBT(itemStack, other.itemStack) && gasType.getID() == other.gasType.getID();
 	}
 

src/main/java/mekanism/common/recipe/inputs/ChemicalPairInput.java

@@ -147,8 +147,12 @@ public class ChemicalPairInput extends MachineInput<ChemicalPairInput>
 	@Override
 	public boolean testEquality(ChemicalPairInput other)
 	{
-			return (other.leftGas.hashCode() == leftGas.hashCode() && other.rightGas.hashCode() == rightGas.hashCode())
-				|| (other.leftGas.hashCode() == rightGas.hashCode() && other.rightGas.hashCode() == leftGas.hashCode());
+		if(!isValid())
+		{
+			return !other.isValid();
+		}
+		return (other.leftGas.hashCode() == leftGas.hashCode() && other.rightGas.hashCode() == rightGas.hashCode())
+			|| (other.leftGas.hashCode() == rightGas.hashCode() && other.rightGas.hashCode() == leftGas.hashCode());
 	}
 
 	@Override

src/main/java/mekanism/common/recipe/inputs/FluidInput.java

@@ -43,6 +43,10 @@ public class FluidInput extends MachineInput<FluidInput>
 	@Override
 	public boolean testEquality(FluidInput other)
 	{
+		if(!isValid())
+		{
+			return !other.isValid();
+		}
 		return ingredient.equals(other.ingredient);
 	}
 

src/main/java/mekanism/common/recipe/inputs/GasInput.java

@@ -43,6 +43,10 @@ public class GasInput extends MachineInput<GasInput>
 	@Override
 	public boolean testEquality(GasInput other)
 	{
+		if(!isValid())
+		{
+			return !other.isValid();
+		}
 		return other.ingredient.hashCode() == ingredient.hashCode();
 	}
 

src/main/java/mekanism/common/recipe/inputs/InfusionInput.java

@@ -65,6 +65,10 @@ public class InfusionInput extends MachineInput<InfusionInput>
 	@Override
 	public boolean testEquality(InfusionInput other)
 	{
+		if(!isValid())
+		{
+			return !other.isValid();
+		}
 		return infuse.type == other.infuse.type && StackUtils.equalsWildcardWithNBT(inputStack, other.inputStack);
 	}