Simple compiler bug

[deltamolfar]

Describe the bug
Compiler bug

To Reproduce
Attempt to call nil lambda.

@persist A:function

A()

Expected behavior
Verbose error

Error message
sv: Expression 2 (generic): Internal error 'addons/wire/lua/entities/gmod_wire_expression2/base/compiler.lua:1884: attempt to index local 'f' (a nil value)' at line 3, char 1

[Vurv78]

It is intentional to avoid overhead with the nil check since the error is harmless. That would ideally be a compile error since the variable isn't initialized though.

No functions should give you a nil lambda