Prevent InitFakePlayer to be called from clientside

Will fix the issue with casting WorldClient to WorldServer.

```
java.lang.ClassCastException: net.minecraft.client.multiplayer.WorldClient cannot be cast to net.minecraft.world.WorldServer

    at tmechworks.lib.player.FakePlayerLogic.<init>(FakePlayerLogic.java:16)
    at tmechworks.blocks.logic.AdvancedDrawbridgeLogic.initFakePlayer(AdvancedDrawbridgeLogic.java:70)
    at tmechworks.blocks.logic.AdvancedDrawbridgeLogic.func_145845_h(AdvancedDrawbridgeLogic.java:340)
    at net.minecraft.world.World.func_72939_s(World.java:1912)
    at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1995)
    at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:962)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:887)
    at net.minecraft.client.main.Main.main(SourceFile:148)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(-2)
    at sun.reflect.NativeMethodAccessorImpl.invoke(-1)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(-1)
    at java.lang.reflect.Method.invoke(-1)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:134)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
```