Added test for `object::operator()` of different arities.
Added test for `object::operator()` of different
arities.


rpavlik/luabind,alex85k/luabind,rpavlik/luabind,mdave88/luabind,Wohlhabend-Networks/luabind-deboostified,plsytj/luabind,Kazade/luabind-deboostified,alex85k/luabind,rpavlik/luabind,rpavlik/luabind,decimad/luabind-deboostified,alex85k/luabind,mapbox/luabind,rpavlik/luabind,lonski/luabind,davidar/luabind,galek/luabind-deboostified,alex85k/luabind,luabind/luabind,luabind/luabind,grafi-tt/luabind,luabind/luabind,Oberon00/luabind,Oberon00/luabind,ltjax/luabind-deboostified,luabind/luabind,MrApplejuice/luabind