fix crash in FluidIngredient testing (pizzer)

Author: DaFuqs

src/main/java/de/dafuqs/spectrum/api/recipe/FluidIngredient.java

@@ -99,7 +99,7 @@ public Identifier id() {
 
     public boolean test(@NotNull Fluid fluid) {
         Objects.requireNonNull(fluid);
-        if (this == EMPTY && fluid != Fluids.EMPTY) return false;
+        if (this == EMPTY) return fluid == Fluids.EMPTY;
         if (this.fluid != null) return this.fluid == fluid;
         if (this.tag != null) return fluid.getDefaultState().isIn(this.tag);