Fix arity of functions
Fix arity of functions

A value was being accessed after it was moved.

kamilzubair/ChaiScript,kamilzubair/ChaiScript,kamilzubair/ChaiScript,bradparks/ChaiScript__cplusplus_scripting_language,bradparks/ChaiScript__cplusplus_scripting_language,bradparks/ChaiScript__cplusplus_scripting_language