[MC-86200] breaking dragon skull in survival crashing

trigger:
1. place dragon skull in creative
2. do /gamemode 0
3. break the dragon skull
4. see crash report
5. (for mojang only) fix this bug!

Description: Rendering entity in world

java.lang.NullPointerException: Rendering entity in world
	at acj.j(SourceFile:229)
	at bjq.b(SourceFile:50)
	at bjq.a(SourceFile:35)
	at boa.a(SourceFile:212)
	at bny.a(SourceFile:109)
	at bny.a(SourceFile:19)
	at bnn.a(SourceFile:302)
	at bnn.a(SourceFile:267)
	at bnn.a(SourceFile:234)
	at bjt.a(SourceFile:605)
	at bjm.a(SourceFile:1253)
	at bjm.b(SourceFile:1158)
	at bjm.a(SourceFile:1005)
	at ayy.au(SourceFile:905)
	at ayy.a(SourceFile:328)
	at net.minecraft.client.main.Main.main(SourceFile:125)