Don't allow respawning offline players

CraftBukkit-Patches/0057-Implement-respawn-API.patch

@@ -1,11 +1,11 @@
-From a59e57191f00a217a60022aabbc270e68fb09060 Mon Sep 17 00:00:00 2001
+From 5525c79dcc3eaf26c4b4785eca9bdc14ff6c38ad Mon Sep 17 00:00:00 2001
 From: ninja- <xninja@openmailbox.org>
 Date: Tue, 8 Oct 2013 14:34:49 +0200
 Subject: [PATCH] Implement respawn API.
 
 
 diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
-index 22fc18f..5219468 100644
+index 22fc18f..f8e43d1 100644
 --- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
 +++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
 @@ -1272,6 +1272,15 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
@@ -16,7 +16,7 @@ index 22fc18f..5219468 100644
 +        @Override
 +        public void respawn()
 +        {
-+            if ( getHealth() <= 0 )
++            if ( getHealth() <= 0 && isOnline() )
 +            {
 +                server.getServer().getPlayerList().moveToWorld( getHandle(), 0, false );
 +            }