Please don't use "null" as a spam exclusion. Guard against it anway.

CraftBukkit-Patches/0046-Spam-Filter-Exclusions.patch

@@ -1,11 +1,11 @@
-From 96aa10ca1474a46f04f9f3aa29c69d67b9271007 Mon Sep 17 00:00:00 2001
+From bafdd4b67c62daebb5e46fd2ec69110ea47c9a27 Mon Sep 17 00:00:00 2001
 From: md_5 <md_5@live.com.au>
 Date: Fri, 21 Jun 2013 17:59:22 +1000
 Subject: [PATCH] Spam Filter Exclusions
 
 
 diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
-index 2d04541..5d669d0 100644
+index 2d04541..9f8cc39 100644
 --- a/src/main/java/net/minecraft/server/PlayerConnection.java
 +++ b/src/main/java/net/minecraft/server/PlayerConnection.java
 @@ -837,7 +837,17 @@ public class PlayerConnection extends Connection {
@@ -17,7 +17,7 @@ index 2d04541..5d669d0 100644
 +                boolean counted = true;
 +                for ( String exclude : org.spigotmc.SpigotConfig.spamExclusions )
 +                {
-+                    if ( s.startsWith( exclude ) )
++                    if ( exclude != null && s.startsWith( exclude ) )
 +                    {
 +                        counted = false;
 +                        break;
@@ -28,7 +28,7 @@ index 2d04541..5d669d0 100644
                          Waitable waitable = new Waitable() {
                              @Override
 diff --git a/src/main/java/org/spigotmc/SpigotConfig.java b/src/main/java/org/spigotmc/SpigotConfig.java
-index 9a45d86..1ec9272 100644
+index a598954..710d12c 100644
 --- a/src/main/java/org/spigotmc/SpigotConfig.java
 +++ b/src/main/java/org/spigotmc/SpigotConfig.java
 @@ -225,4 +225,13 @@ public class SpigotConfig