Add SpawnReason.DROWNED

nms-patches/EntityZombie.patch

@@ -30,6 +30,15 @@
              }
          }
  
+@@ -220,7 +234,7 @@
+                 entityzombie.setCustomNameVisible(this.getCustomNameVisible());
+             }
+ 
+-            this.world.addEntity(entityzombie);
++            this.world.addEntity(entityzombie, CreatureSpawnEvent.SpawnReason.DROWNED); // CraftBukkit - added spawn reason
+             this.die();
+         }
+     }
 @@ -251,8 +265,8 @@
                      if (this.world.getType(new BlockPosition(i1, j1 - 1, k1)).q() && this.world.getLightLevel(new BlockPosition(i1, j1, k1)) < 10) {
                          entityzombie.setPosition((double) i1, (double) j1, (double) k1);