java.lang.NullPointerException
    at um.a(SourceFile:28)
    at iv.a(SourceFile:12)
    at iv.a(SourceFile:9)
    at ahu.a(ahu.java:149)
    at ws.a(SourceFile:64)
    at cw.b(SourceFile:116)
    at lr.a(EntityRenderer.java:1354)
    at lr.b(EntityRenderer.java:1052)
    at EntityRendererProxy.b(EntityRendererProxy.java:21)
    at net.minecraft.client.Minecraft.x(SourceFile:752)
    at net.minecraft.client.Minecraft.run(SourceFile:671)
    at java.lang.Thread.run(Unknown Source)