Giants Error

11:14 AM [SEVERE] Could not pass event EntityTargetEvent to Giants v5.0
Caused by: java.lang.NullPointerException
    at me.pkt77.giants.events.Listeners.FireAttack(Listeners.java:144)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.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)
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
    at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:35)
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
    at net.minecraft.server.v1_5_R3.EntityCreature.bq(EntityCreature.java:61)
    at net.minecraft.server.v1_5_R3.EntityLiving.c(EntityLiving.java:1303)
    at net.minecraft.server.v1_5_R3.EntityMonster.c(EntityMonster.java:20)
    at net.minecraft.server.v1_5_R3.EntityLiving.l_(EntityLiving.java:526)
    at net.minecraft.server.v1_5_R3.EntityMonster.l_(EntityMonster.java:24)
    at net.minecraft.server.v1_5_R3.World.entityJoinedWorld(World.java:1355)
    at net.minecraft.server.v1_5_R3.WorldServer.entityJoinedWorld(WorldServer.java:614)
    at net.minecraft.server.v1_5_R3.World.playerJoinedWorld(World.java:1336)
    at net.minecraft.server.v1_5_R3.World.tickEntities(World.java:1224)
    at net.minecraft.server.v1_5_R3.WorldServer.tickEntities(WorldServer.java:480)
    at net.minecraft.server.v1_5_R3.MinecraftServer.r(MinecraftServer.java:563)
    at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:226)
    at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:477)
    at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:410)
    at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)