Fix FurnaceGenerator burning entire item stack

Author: NichtStudioCode

machines/src/main/kotlin/xyz/xenondevs/nova/addon/machines/tileentity/energy/FurnaceGenerator.kt

@@ -25,6 +25,7 @@ import xyz.xenondevs.nova.util.PacketTask
 import xyz.xenondevs.nova.util.advance
 import xyz.xenondevs.nova.util.axis
 import xyz.xenondevs.nova.util.item.craftingRemainingItem
+import xyz.xenondevs.nova.util.item.isNotNullOrEmpty
 import xyz.xenondevs.nova.util.particle.particle
 import xyz.xenondevs.nova.world.BlockPos
 import xyz.xenondevs.nova.world.block.state.NovaBlockState
@@ -121,12 +122,12 @@ class FurnaceGenerator(pos: BlockPos, blockState: NovaBlockState, data: Compound
         val fuelStack = inventory.getItem(0)
         if (energyHolder.energy < energyHolder.maxEnergy && fuelStack != null) {
             val itemBurnTime = Fuel.getBurnTime(fuelStack)
-            if (itemBurnTime != null) {
+            if (itemBurnTime > 0) {
                 rawBurnTime.set(itemBurnTime)
                 currentBurnTime = 0
 
                 val remains = fuelStack.craftingRemainingItem
-                if (remains != null) {
+                if (remains.isNotNullOrEmpty()) {
                     inventory.setItem(null, 0, remains)
                 } else inventory.addItemAmount(null, 0, -1)
             }

machines/src/main/kotlin/xyz/xenondevs/nova/addon/machines/tileentity/processing/AutoCrafter.kt

@@ -28,6 +28,7 @@ import xyz.xenondevs.nova.ui.menu.item.BackItem
 import xyz.xenondevs.nova.ui.menu.sideconfig.OpenSideConfigItem
 import xyz.xenondevs.nova.ui.menu.sideconfig.SideConfigMenu
 import xyz.xenondevs.nova.util.item.craftingRemainingItem
+import xyz.xenondevs.nova.util.item.isNotNullOrEmpty
 import xyz.xenondevs.nova.util.playClickSound
 import xyz.xenondevs.nova.world.BlockPos
 import xyz.xenondevs.nova.world.block.state.NovaBlockState
@@ -148,8 +149,8 @@ class AutoCrafter(pos: BlockPos, blockState: NovaBlockState, data: Compound) : N
         val resultItems = ArrayList<ItemStack>()
         for (i in 0..<9) {
             val remaining = inputInv.getItem(i)?.craftingRemainingItem
-            if (remaining != null)
-                resultItems += remaining
+            if (remaining.isNotNullOrEmpty())
+                resultItems += remaining!!
         }
         return resultItems
     }