Fix isEdgeOfChunk check for MCUtils

Spigot-Server-Patches/0004-MC-Utils.patch

@@ -1,4 +1,4 @@
-From bb8dd93f486683d2a80fe0d23337f11faca44e9a Mon Sep 17 00:00:00 2001
+From 2bce99d815e516c5ea740c9f161933d7f7f5bcdd Mon Sep 17 00:00:00 2001
 From: Aikar <aikar@aikar.co>
 Date: Mon, 28 Mar 2016 20:55:47 -0400
 Subject: [PATCH] MC Utils
@@ -7,7 +7,7 @@ Collection of utils to help reduce NMS diff
 
 diff --git a/src/main/java/net/minecraft/server/MCUtil.java b/src/main/java/net/minecraft/server/MCUtil.java
 new file mode 100644
-index 0000000..3004822
+index 0000000..abe7e9f
 --- /dev/null
 +++ b/src/main/java/net/minecraft/server/MCUtil.java
 @@ -0,0 +1,115 @@
@@ -121,9 +121,9 @@ index 0000000..3004822
 +    }
 +
 +    public static boolean isEdgeOfChunk(BlockPosition pos) {
-+        final int absX = Math.abs(pos.getX()) % 16;
-+        final int absZ = Math.abs(pos.getZ()) % 16;
-+        return (absX == 0 || absX == 15 || absZ == 0 || absZ == 15);
++        final int modX = pos.getX() & 15;
++        final int modZ = pos.getZ() & 15;
++        return (modX == 0 || modX == 15 || modZ == 0 || modZ == 15);
 +    }
 +}
 --