[MC-47298] Spectator Mode/Night Vision Crash

When joining a server and switching to "Spectator" mode anyone on the server before you with a different vision setting (night vs normal) than you, you can't spectate without crashing.

Video of the bug in action. If you change vision modes after online it will fix the issue.
http://youtu.be/sCXBWSfMFJw

Description: Unexpected error

java.lang.NullPointerException: Unexpected error
	at bpq.a(SourceFile:862)
	at bpq.j(SourceFile:1637)
	at bpq.a(SourceFile:1063)
	at bpq.b(SourceFile:935)
	at bcf.ag(SourceFile:803)
	at bcf.f(SourceFile:730)
	at net.minecraft.client.main.Main.main(SourceFile:154)