[MC-35655] Game crashes when changing the player sound slider

created new profile
started new snapshot
created new world
hit escape
went into sound & music settings
adjusted the sliders
finally crashed on the player sound slider.

Updating screen events

java.lang.NullPointerException: Updating screen events
	at bsl.a(SourceFile:306)
	at bsl.a(SourceFile:112)
	at bsr.a(SourceFile:191)
	at azp.a(SourceFile:793)
	at bcd.c(SourceFile:117)
	at bbw.a(SourceFile:169)