Additional fireworks damage tracking.

nms-patches/EntityFireworks.patch

@@ -33,3 +33,13 @@
              }
  
              double d0 = 5.0D;
+@@ -162,7 +169,9 @@
+                     if (flag) {
+                         float f1 = f * (float) Math.sqrt((5.0D - (double) this.g(entityliving)) / 5.0D);
+ 
++                        CraftEventFactory.entityDamage = this; // CraftBukkit
+                         entityliving.damageEntity(DamageSource.t, f1);
++                        CraftEventFactory.entityDamage = null; // CraftBukkit
+                     }
+                 }
+             }