Guns+ Error

17:37:06 [WARNING] [GunsPlus] Task #76 for GunsPlus v1.8 generated an exception
java.lang.ClassCastException: java.lang.Double cannot be cast to java.lang.Integer
        at team.GunsPlus.Util.GunUtils.getTargets(GunUtils.java:109)
        at team.GunsPlus.GunsPlusPlayer.fire(GunsPlusPlayer.java:168)
        at team.GunsPlus.FireBinding$1.run(FireBinding.java:43)
        at org.bukkit.craftbukkit.v1_4_R1.scheduler.CraftTask.run(CraftTask.java:53)
        at org.bukkit.craftbukkit.v1_4_R1.scheduler.CraftScheduler.mainThreadHeartbe
        at net.minecraft.server.v1_4_R1.MinecraftServer.r(MinecraftServer.java:530)
        at net.minecraft.server.v1_4_R1.DedicatedServer.r(DedicatedServer.java:224)
        at net.minecraft.server.v1_4_R1.MinecraftServer.q(MinecraftServer.java:494)
        at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java:427
        at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:849)