Using cPlayer:GetWorld() crashes the checker

[madmaxoft]

It seems that using cPlayer:GetWorld() crashes the checker, because it attempts to convert it to a cBroadcastInterface somehow:

Attempting to use an unknown Global value "cBroadcastInterface", nil will be returned.
stack traceback:
	Simulator.lua:1168: in function <Simulator.lua:1152>
	Simulator.lua:501: in function 'createApiEndpoint'
	Simulator.lua:554: in function <Simulator.lua:548>
	/home/ubuntu/Core/spawn.lua:6: in function 'SendPlayerToWorldSpawn'
	/home/ubuntu/Core/spawn.lua:57: in function 'Function'
	Simulator.lua:1392: in function 'processCallbackRequest'
	Simulator.lua:966: in function 'executePlayerCommand'
	Scenario.lua:179: in function 'fuzzSingleCommand'
	...
lua: Simulator.lua:501: attempt to index field '?' (a nil value)
stack traceback:
	Simulator.lua:501: in function 'createApiEndpoint'
	Simulator.lua:554: in function <Simulator.lua:548>
	/home/ubuntu/Core/spawn.lua:6: in function 'SendPlayerToWorldSpawn'
	/home/ubuntu/Core/spawn.lua:57: in function 'Function'
	Simulator.lua:1392: in function 'processCallbackRequest'
	Simulator.lua:966: in function 'executePlayerCommand'
	Scenario.lua:179: in function 'fuzzSingleCommand'
	...

Plugin: cuberite/Core#197 (comment)
CI log: https://circleci.com/gh/cuberite/Core/57