commands fail via rcon

[Paul Bransford]

It seems that commands for wb via rcon are not handled correctly (at least for 1.0.2)

[19:12:02] [RCON Client #5/ERROR]: Couldn't process command: 'wb fill confirm'
java.lang.ClassCastException: net.minecraft.network.rcon.RConConsoleSource cannot be cast to net.minecraft.entity.player.EntityPlayerMP
        at com.wimbli.WorldBorder.WBCommand.func_71519_b(WBCommand.java:231) ~[WBCommand.class:?]
        at net.minecraft.command.CommandHandler.func_71556_a(CommandHandler.java:51) [z.class:?]
        at net.minecraft.server.MinecraftServer.func_71252_i(MinecraftServer.java:1410) [MinecraftServer.class:?]
        at net.minecraft.network.rcon.RConThreadClient.run(SourceFile:84) [oz.class:?]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_141]