Bukkit SpawnerAdjuster crash

2012-12-27 07:16:42 [SEVERE] Could not pass event BlockRedstoneEvent to SpawnerAdjuster v1.9.0 alpha 2
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427)
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
	at net.minecraft.server.v1_4_6.BlockRedstoneWire.a(BlockRedstoneWire.java:114)
	at net.minecraft.server.v1_4_6.BlockRedstoneWire.l(BlockRedstoneWire.java:45)
	at net.minecraft.server.v1_4_6.BlockRedstoneWire.doPhysics(BlockRedstoneWire.java:292)
	at net.minecraft.server.v1_4_6.World.m(World.java:507)
	at net.minecraft.server.v1_4_6.World.applyPhysics(World.java:484)
	at net.minecraft.server.v1_4_6.BlockRedstoneWire.l(BlockRedstoneWire.java:53)
	at net.minecraft.server.v1_4_6.BlockRedstoneWire.doPhysics(BlockRedstoneWire.java:292)
	at net.minecraft.server.v1_4_6.World.m(World.java:507)
	at net.minecraft.server.v1_4_6.World.applyPhysics(World.java:484)
	at net.minecraft.server.v1_4_6.BlockRedstoneWire.l(BlockRedstoneWire.java:53)
	at net.minecraft.server.v1_4_6.BlockRedstoneWire.doPhysics(BlockRedstoneWire.java:292)
	at net.minecraft.server.v1_4_6.World.m(World.java:507)
	at net.minecraft.server.v1_4_6.World.applyPhysics(World.java:480)
	at net.minecraft.server.v1_4_6.BlockRedstoneWire.l(BlockRedstoneWire.java:53)
	at net.minecraft.server.v1_4_6.BlockRedstoneWire.doPhysics(BlockRedstoneWire.java:292)
	at net.minecraft.server.v1_4_6.World.m(World.java:507)
	at net.minecraft.server.v1_4_6.World.applyPhysics(World.java:480)
	at net.minecraft.server.v1_4_6.BlockRedstoneWire.l(BlockRedstoneWire.java:53)
	at net.minecraft.server.v1_4_6.BlockRedstoneWire.doPhysics(BlockRedstoneWire.java:292)
	at net.minecraft.server.v1_4_6.World.m(World.java:507)
	at net.minecraft.server.v1_4_6.World.applyPhysics(World.java:484)
	at net.minecraft.server.v1_4_6.BlockRedstoneWire.l(BlockRedstoneWire.java:53)
	at net.minecraft.server.v1_4_6.BlockRedstoneWire.doPhysics(BlockRedstoneWire.java:292)
	at net.minecraft.server.v1_4_6.World.m(World.java:507)
	at net.minecraft.server.v1_4_6.World.applyPhysics(World.java:484)
	at net.minecraft.server.v1_4_6.BlockRedstoneWire.l(BlockRedstoneWire.java:53)
	at net.minecraft.server.v1_4_6.BlockRedstoneWire.doPhysics(BlockRedstoneWire.java:292)
	at net.minecraft.server.v1_4_6.World.m(World.java:507)
	at net.minecraft.server.v1_4_6.World.applyPhysics(World.java:484)
	at net.minecraft.server.v1_4_6.BlockRedstoneWire.l(BlockRedstoneWire.java:53)
	at net.minecraft.server.v1_4_6.BlockRedstoneWire.doPhysics(BlockRedstoneWire.java:292)
	at net.minecraft.server.v1_4_6.World.m(World.java:507)
	at net.minecraft.server.v1_4_6.World.applyPhysics(World.java:481)
	at net.minecraft.server.v1_4_6.World.update(World.java:446)
	at net.minecraft.server.v1_4_6.World.setTypeIdAndData(World.java:432)
	at net.minecraft.server.v1_4_6.BlockRedstoneTorch.b(BlockRedstoneTorch.java:152)
	at net.minecraft.server.v1_4_6.WorldServer.a(WorldServer.java:506)
	at net.minecraft.server.v1_4_6.WorldServer.doTick(WorldServer.java:176)
	at net.minecraft.server.v1_4_6.MinecraftServer.r(MinecraftServer.java:559)
	at net.minecraft.server.v1_4_6.DedicatedServer.r(DedicatedServer.java:224)
	at net.minecraft.server.v1_4_6.MinecraftServer.q(MinecraftServer.java:481)
	at net.minecraft.server.v1_4_6.MinecraftServer.run(MinecraftServer.java:416)
	at net.minecraft.server.v1_4_6.ThreadServerApplication.run(SourceFile:849)
Caused by: java.lang.IndexOutOfBoundsException: Index: 0
	at java.util.Collections$EmptyList.get(Unknown Source)
	at com.sadmean.mc.SpawnerAdjuster.SpawnerAdjuster.canSpawn(SpawnerAdjuster.java:323)
	at com.sadmean.mc.SpawnerAdjuster.AdjusterBlockListener.forceSpawn(AdjusterBlockListener.java:196)
	at com.sadmean.mc.SpawnerAdjuster.AdjusterBlockListener.onBlockRedstoneChange(AdjusterBlockListener.java:87)
	at sun.reflect.GeneratedMethodAccessor351.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425)
	... 46 more