[walker] Allow recursive walks without building a new walker obj
[walker] Allow recursive walks without building a new walker obj

shuhei/babel,kaicataldo/babel,mathiasbynens/acorn,marijnh/acorn,hulkish/babel,marcominetti/acorn-babel,vadzim/babel,guybedford/babel,hzoo/babel,existentialism/babel,RReverser/biscript,shuhei/babel,CSNW/acorn,luiseduardohdbackup/filbert,samwgoldman/babel,tonylukasavage/acorn,claudiopro/babel,PolymerLabs/babel,jridgewell/babel,kaicataldo/babel,hzoo/babel,thr0w/acorn-jsx,luiseduardohdbackup/filbert,samhou1988/acorn,xiemaisi/acorn,hulkish/babel,ajaxorg/acorn,maurobringolf/babel,ternjs/acorn,claudiopro/babel,kaicataldo/babel,existentialism/babel,differentmatt/filbert,marijnh/acorn,wcjohnson/babylon-lightscript,happibum/acorn,mathiasbynens/acorn,maurobringolf/babel,kellyselden/babel,hzoo/babel,Skillupco/babel,sebmck/acorn-jsx,maurobringolf/babel,happibum/acorn,xiemaisi/acorn,kellyselden/babel,mysticatea/acorn,hulkish/babel,jridgewell/babel,gratex/acorn,btmills/acorn,blai/acorn-jsx,gratex/acorn,benekastah/acorn,kellyselden/babel,lightscript/babylon-lightscript,kittens/acorn-jsx,babel/babel,PolymerLabs/babel,Rich-Harris/acorn,marcominetti/acorn-babel,Rich-Harris/acorn,differentmatt/filbert,btmills/acorn,vadzim/babel,MarcelGerber/acorn,marijnh/acorn,happibum/acorn,RReverser/acorn-jsx,TimothyGu/acorn,hulkish/babel,mathiasbynens/acorn,hzoo/babel,mysticatea/acorn,ternjs/acorn,babel/babel,cbishopvelti/babylon,samhou1988/acorn,existentialism/babel,sebmck/acorn-jsx,MarcelGerber/acorn,PolymerLabs/babel,MarcelGerber/acorn,babel/babel,shuhei/babel,TimothyGu/acorn,kaicataldo/babel,babel/babylon,kellyselden/babel,ajaxorg/acorn,kidaa/filbert,kidaa/filbert,kittens/acorn-jsx,Skillupco/babel,Rich-Harris/acorn,marcominetti/acorn-babel,samwgoldman/babel,jridgewell/babel,samwgoldman/babel,guybedford/babel,gratex/acorn,TimothyGu/acorn,ternjs/acorn,chicoxyzzy/babel,chicoxyzzy/babel,chicoxyzzy/babel,jridgewell/babel,btmills/acorn,babel/babel,Skillupco/babel,recipesjs/ingredients,chicoxyzzy/babel,claudiopro/babel,guybedford/babel,mysticatea/acorn,xiemaisi/acorn,danez/babylon,ajaxorg/acorn,Skillupco/babel