Do not generate _args if stack_arguments isn't set, again
Do not generate _args if stack_arguments isn't set, again

Summary: This is to redo D1820302 and fix the issue in #6154155

Test Plan: fbconfig unicorn/tools&&fbmake dbg

Reviewed By: philipp@fb.com, alandau@fb.com

Subscribers: chaoyc, search-fbcode-diffs@, ruibalp, unicorn-diffs@, alandau, mshneer, yfeldblum

FB internal diff: D1825851

Tasks: 6154155

Signature: t1:1825851:1423087173:07172629b080ac29132cfe0cc6441cbabdcb3aae

raphaelamorim/fbthrift,maxwell-demon/fbthrift,HankFaan/fbthrift,kangkot/fbthrift,maxwell-demon/fbthrift,sinjar666/fbthrift,SergeyMakarenko/fbthrift,kangkot/fbthrift,LinusU/fbthrift,project-zerus/fbthrift,HankFaan/fbthrift,raphaelamorim/fbthrift,SergeyMakarenko/fbthrift,fengshao0907/fbthrift,soumith/fbthrift,HankFaan/fbthrift,raphaelamorim/fbthrift,guker/fbthrift,sinjar666/fbthrift,chjp2046/fbthrift,HankFaan/fbthrift,chjp2046/fbthrift,raphaelamorim/fbthrift,project-zerus/fbthrift,maxwell-demon/fbthrift,facebook/fbthrift,maxwell-demon/fbthrift,SergeyMakarenko/fbthrift,getyourguide/fbthrift,maxwell-demon/fbthrift,guker/fbthrift,getyourguide/fbthrift,chjp2046/fbthrift,chjp2046/fbthrift,raphaelamorim/fbthrift,Orvid/fbthrift,maxwell-demon/fbthrift,guker/fbthrift,chjp2046/fbthrift,LinusU/fbthrift,chjp2046/fbthrift,fengshao0907/fbthrift,SergeyMakarenko/fbthrift,fengshao0907/fbthrift,SergeyMakarenko/fbthrift,SergeyMakarenko/fbthrift,LinusU/fbthrift,LinusU/fbthrift,guker/fbthrift,Orvid/fbthrift,HankFaan/fbthrift,guker/fbthrift,getyourguide/fbthrift,raphaelamorim/fbthrift,facebook/fbthrift,raphaelamorim/fbthrift,Orvid/fbthrift,guker/fbthrift,raphaelamorim/fbthrift,chjp2046/fbthrift,LinusU/fbthrift,soumith/fbthrift,fengshao0907/fbthrift,maxwell-demon/fbthrift,maxwell-demon/fbthrift,project-zerus/fbthrift,project-zerus/fbthrift,getyourguide/fbthrift,Orvid/fbthrift,LinusU/fbthrift,LinusU/fbthrift,project-zerus/fbthrift,project-zerus/fbthrift,fengshao0907/fbthrift,project-zerus/fbthrift,sinjar666/fbthrift,SergeyMakarenko/fbthrift,SergeyMakarenko/fbthrift,LinusU/fbthrift,sinjar666/fbthrift,HankFaan/fbthrift,getyourguide/fbthrift,facebook/fbthrift,kangkot/fbthrift,getyourguide/fbthrift,soumith/fbthrift,project-zerus/fbthrift,soumith/fbthrift,SergeyMakarenko/fbthrift,chjp2046/fbthrift,getyourguide/fbthrift,guker/fbthrift,sinjar666/fbthrift,sinjar666/fbthrift,maxwell-demon/fbthrift,HankFaan/fbthrift,SergeyMakarenko/fbthrift,chjp2046/fbthrift,HankFaan/fbthrift,maxwell-demon/fbthrift,soumith/fbthrift,kangkot/fbthrift,kangkot/fbthrift,sinjar666/fbthrift,facebook/fbthrift,chjp2046/fbthrift,Orvid/fbthrift,kangkot/fbthrift,getyourguide/fbthrift,sinjar666/fbthrift,project-zerus/fbthrift,LinusU/fbthrift,project-zerus/fbthrift,maxwell-demon/fbthrift,guker/fbthrift,guker/fbthrift,guker/fbthrift,facebook/fbthrift,fengshao0907/fbthrift,SergeyMakarenko/fbthrift,kangkot/fbthrift,facebook/fbthrift,SergeyMakarenko/fbthrift,HankFaan/fbthrift,fengshao0907/fbthrift,sinjar666/fbthrift,raphaelamorim/fbthrift,fengshao0907/fbthrift,soumith/fbthrift,fengshao0907/fbthrift,HankFaan/fbthrift,Orvid/fbthrift,facebook/fbthrift,Orvid/fbthrift,facebook/fbthrift,LinusU/fbthrift,guker/fbthrift,chjp2046/fbthrift,sinjar666/fbthrift,getyourguide/fbthrift,kangkot/fbthrift,LinusU/fbthrift,project-zerus/fbthrift,soumith/fbthrift,HankFaan/fbthrift,getyourguide/fbthrift,sinjar666/fbthrift,getyourguide/fbthrift,raphaelamorim/fbthrift,soumith/fbthrift,Orvid/fbthrift,raphaelamorim/fbthrift,getyourguide/fbthrift,kangkot/fbthrift,kangkot/fbthrift,soumith/fbthrift,soumith/fbthrift,Orvid/fbthrift,Orvid/fbthrift,kangkot/fbthrift,soumith/fbthrift,fengshao0907/fbthrift,facebook/fbthrift,chjp2046/fbthrift,Orvid/fbthrift,fengshao0907/fbthrift,project-zerus/fbthrift