Check the block water mobs spawn in, not the block under

Spigot-Server-Patches/0139-Water-mobs-should-only-spawn-in-the-water.patch

@@ -1,11 +1,11 @@
-From d4985b594d55ee94ef5b68677eda3496d6cd8149 Mon Sep 17 00:00:00 2001
+From 3144b183fd16deaacce4e8dd932ba58849b03aa9 Mon Sep 17 00:00:00 2001
 From: Zach Brown <zach.brown@destroystokyo.com>
 Date: Thu, 14 Apr 2016 17:48:56 -0500
 Subject: [PATCH] Water mobs should only spawn in the water
 
 
 diff --git a/src/main/java/net/minecraft/server/EntityWaterAnimal.java b/src/main/java/net/minecraft/server/EntityWaterAnimal.java
-index f4764da..2aa0391 100644
+index f4764da..9cd85f1 100644
 --- a/src/main/java/net/minecraft/server/EntityWaterAnimal.java
 +++ b/src/main/java/net/minecraft/server/EntityWaterAnimal.java
 @@ -11,7 +11,15 @@ public abstract class EntityWaterAnimal extends EntityInsentient implements IAni
@@ -18,9 +18,9 @@ index f4764da..2aa0391 100644
 +        int i = MathHelper.floor(this.locX);
 +        int j = MathHelper.floor(this.getBoundingBox().b); // minY of bounding box
 +        int k = MathHelper.floor(this.locZ);
-+        Block below = this.world.getType(new BlockPosition(i, j, k).down()).getBlock();
++        Block block = this.world.getType(new BlockPosition(i, j, k)).getBlock();
 +
-+        return below == Blocks.WATER || below == Blocks.FLOWING_WATER;
++        return block == Blocks.WATER || block == Blocks.FLOWING_WATER;
 +        // Paper end
      }