Bukkit

What is the issue?
My voter is not working when its time to vote i get this error on the server log:

[22:18:44] [Server thread/INFO]: spiderpig1o died
[22:18:45] [Server thread/INFO]: You survived to wave 1!
[22:18:45] [Server thread/WARN]: [ZArena] Task #240 for ZArena v0.1 generated an exception
java.lang.IllegalArgumentException: n must be positive
    at java.util.Random.nextInt(Unknown Source) ~[?:1.7.0_51]
    at com.github.zarena.Gamemode.getRandomGamemode(Gamemode.java:316) ~[?:?]
    at com.github.zarena.LevelVoter.start(LevelVoter.java:104) ~[?:?]
    at com.github.zarena.WaveHandler.run(WaveHandler.java:614) ~[?:?]
    at org.bukkit.craftbukkit.v1_7_R1.scheduler.CraftTask.run(CraftTask.java:53) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.2-3-g530fcb7-b2982jnks]
    at org.bukkit.craftbukkit.v1_7_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:345) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-3-g530fcb7-b2982jnks]
    at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:587) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-3-g530fcb7-b2982jnks]
    at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:250) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-3-g530fcb7-b2982jnks]
    at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:545) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-3-g530fcb7-b2982jnks]
    at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:457) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-3-g530fcb7-b2982jnks]

Please provide any additional information below.
i have 2 maps created and the voter worked 1 time then i restarted server and it broke again and im getting frustrated so plz help me fix this

Thanks for the ticket, this will be fixed in the next update.

@kabbx: Go

when will a new update come?