Re-implementing luac

[Tim Hunter <TimHunter@...>]

I need to implement the functionality of luac within my own peculiar 
environment. Mostly I'm just copying the code in luac.c. I have 
everything working fine, except that the expression 
(clvalue(L->top+(i))->l.p) (in the toproto macro) means that I must have 
the complete definition of lua_State in scope, instead of the incomplete 
definition provided by lua.h that is all I need everywhere else.

I can of course resolve this by including lstate.h, but I want to make 
sure I'm not overlooking a superior solution. Am I doing the right thing 
or is there a better practice?