Fix JEI bookmarking Mekanism chemicals from AE2 filters (#72)

src/main/java/me/ramidzkh/mekae2/integration/jei/ChemicalIngredientConverter.java

@@ -29,7 +29,7 @@ public IIngredientType<ChemicalStack> getIngredientType() {
     @Override
     public @Nullable ChemicalStack getIngredientFromStack(GenericStack genericStack) {
         if (genericStack.what() instanceof MekanismKey key) {
-            return key.withAmount(genericStack.amount());
+            return key.withAmount(Math.max(1, genericStack.amount()));
         }
         return null;
     }