SPIGOT-3126: Make fireballs do a better job of respecting mobGriefing

By: md_5 <git@md-5.net>

paper-server/nms-patches/EntityLargeFireball.patch

@@ -1,6 +1,6 @@
 --- a/net/minecraft/server/EntityLargeFireball.java
 +++ b/net/minecraft/server/EntityLargeFireball.java
-@@ -1,5 +1,7 @@
+@@ -1,15 +1,19 @@
  package net.minecraft.server;
  
 +import org.bukkit.event.entity.ExplosionPrimeEvent; // CraftBukkit
@@ -8,7 +8,19 @@
  public class EntityLargeFireball extends EntityFireball {
  
      public int yield = 1;
-@@ -21,7 +23,15 @@
+ 
+     public EntityLargeFireball(World world) {
+         super(world);
++        isIncendiary = this.world.getGameRules().getBoolean("mobGriefing"); // CraftBukkit
+     }
+ 
+     public EntityLargeFireball(World world, EntityLiving entityliving, double d0, double d1, double d2) {
+         super(world, entityliving, d0, d1, d2);
++        isIncendiary = this.world.getGameRules().getBoolean("mobGriefing"); // CraftBukkit
+     }
+ 
+     protected void a(MovingObjectPosition movingobjectposition) {
+@@ -21,7 +25,15 @@
  
              boolean flag = this.world.getGameRules().getBoolean("mobGriefing");
  
@@ -19,13 +31,13 @@
 +
 +            if (!event.isCancelled()) {
 +                // give 'this' instead of (Entity) null so we know what causes the damage
-+                this.world.createExplosion(this, this.locX, this.locY, this.locZ, event.getRadius(), event.getFire(), flag);
++                this.world.createExplosion(this, this.locX, this.locY, this.locZ, event.getRadius(), event.getFire(), isIncendiary);
 +            }
 +            // CraftBukkit end
              this.die();
          }
  
-@@ -39,7 +49,8 @@
+@@ -39,7 +51,8 @@
      public void a(NBTTagCompound nbttagcompound) {
          super.a(nbttagcompound);
          if (nbttagcompound.hasKeyOfType("ExplosionPower", 99)) {