[Fixed] Block stacking logic.

UltimateStacker-Plugin/src/main/java/com.craftaro.ultimatestacker/listeners/BlockListeners.java

@@ -124,7 +124,7 @@ public class BlockListeners implements Listener {
                             player.getWorld().dropItemNaturally(block.getLocation(), stack.getMaterial().parseItem());
                         }
                     }
-                    if (stack.getAmount() == 0) {
+                    if (stack.getAmount() == 1) {
                         //Remove stack
                         stack.destroy();
                         return;

UltimateStacker-Plugin/src/main/java/com.craftaro.ultimatestacker/stackable/block/BlockStackImpl.java

@@ -23,7 +23,7 @@ public class BlockStackImpl implements BlockStack {
     // The id that identifies this stack in the database.
     private int id;
 
-    private int amount = 1;
+    private int amount = 2;
     private XMaterial material;
     private Location location;
 
@@ -79,7 +79,7 @@ public class BlockStackImpl implements BlockStack {
 
     @Override
     public void setAmount(int amount) {
-        if (amount < 1) {
+        if (amount == 1) {
             destroy();
             return;
         }