Fix matter manager recipe finder creating item stacks with infinite cost

src/main/kotlin/ru/dbotthepony/mc/otm/matter/MatterManager.kt

@@ -546,6 +546,12 @@ object MatterManager {
 					}
 
 					stream.map {
+						// avoid reality snap when recipe has no output
+						val resultItem = it.getResultItem(server.registryAccess())
+
+						if (resultItem.isEmpty) {
+							null
+						} else {
 							val width: Int
 							val height: Int
 
@@ -603,12 +609,13 @@ object MatterManager {
 
 							ResolvedRecipe(
 								realIngredients.stream().map { it.stream() },
-							ImmutableStack(it.getResultItem(server.registryAccess())),
+								ImmutableStack(resultItem),
 								isCritical = isCritical,
 								name = it.id,
 								allowBacktrack = allowBacktrack
 							)
-					}.filter {
+						}
+					}.filterNotNull().filter {
 						if (it.inputs.isEmpty()) {
 							LOGGER.warn("${it.formattedName} with output '${it.output.item.registryName}' ended up with no inputs!")
 							false
@@ -1388,6 +1395,11 @@ object MatterManager {
 		val item: Item,
 		val multiplier: Double = 1.0
 	) {
+		init {
+			require(!multiplier.isNaN()) { "Provided stack cost multiplier is NaN" }
+			require(!multiplier.isInfinite()) { "Provided stack cost multiplier is infinite" }
+		}
+
 		constructor(item: Item, count: Int) : this(item, 1.0 / count.toDouble())
 		constructor(item: ItemStack) : this(item.item, item.count)
 	}