Alter furnace cookTime based on total cook time

Fixes GH-613

Spigot-Server-Patches/Fix-Furnace-cook-time-bug.patch

@@ -9,7 +9,7 @@ cook in the expected amount of time as the cook time was not decremented correct
 This patch ensures that furnaces cook to the correct wall time expectation.
 
 diff --git a/src/main/java/net/minecraft/server/TileEntityFurnace.java b/src/main/java/net/minecraft/server/TileEntityFurnace.java
-index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+index 2f1f3edf5..e230d1608 100644
 --- a/src/main/java/net/minecraft/server/TileEntityFurnace.java
 +++ b/src/main/java/net/minecraft/server/TileEntityFurnace.java
 @@ -0,0 +0,0 @@ public class TileEntityFurnace extends TileEntityContainer implements ITickable,
@@ -17,7 +17,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
              this.cookTime += elapsedTicks;
              if (this.cookTime >= this.cookTimeTotal) {
 -                this.cookTime = 0;
-+                this.cookTime -= this.a(this.items.get(0)); // Paper
++                this.cookTime -= this.cookTimeTotal; // Paper
                  this.cookTimeTotal = this.a((ItemStack) this.items.get(0));
                  this.burn();
                  flag1 = true;