MAINT: Use new private field inside _scale
MAINT: Use new private field inside _scale

This will work on:
* old numpy
* new numpy with a workaround to make old scipy work
* future numpy with no such workaround
vigna/scipy,matthew-brett/scipy,tylerjereddy/scipy,befelix/scipy,vigna/scipy,zerothi/scipy,jakevdp/scipy,nmayorov/scipy,perimosocordiae/scipy,scipy/scipy,jjhelmus/scipy,josephcslater/scipy,ilayn/scipy,Stefan-Endres/scipy,WarrenWeckesser/scipy,mdhaber/scipy,ilayn/scipy,jamestwebber/scipy,person142/scipy,WarrenWeckesser/scipy,jor-/scipy,pbrod/scipy,pizzathief/scipy,pizzathief/scipy,matthew-brett/scipy,anntzer/scipy,zerothi/scipy,nmayorov/scipy,nmayorov/scipy,mdhaber/scipy,ilayn/scipy,gfyoung/scipy,WarrenWeckesser/scipy,befelix/scipy,aarchiba/scipy,endolith/scipy,e-q/scipy,endolith/scipy,jor-/scipy,lhilt/scipy,andyfaff/scipy,jakevdp/scipy,tylerjereddy/scipy,mdhaber/scipy,Eric89GXL/scipy,aeklant/scipy,tylerjereddy/scipy,aarchiba/scipy,perimosocordiae/scipy,Stefan-Endres/scipy,pizzathief/scipy,zerothi/scipy,aeklant/scipy,jjhelmus/scipy,WarrenWeckesser/scipy,e-q/scipy,rgommers/scipy,Eric89GXL/scipy,rgommers/scipy,rgommers/scipy,gertingold/scipy,nmayorov/scipy,arokem/scipy,josephcslater/scipy,gfyoung/scipy,Eric89GXL/scipy,scipy/scipy,jakevdp/scipy,jjhelmus/scipy,apbard/scipy,scipy/scipy,pbrod/scipy,pizzathief/scipy,gfyoung/scipy,jamestwebber/scipy,perimosocordiae/scipy,jakevdp/scipy,josephcslater/scipy,endolith/scipy,anntzer/scipy,aarchiba/scipy,grlee77/scipy,pizzathief/scipy,josephcslater/scipy,grlee77/scipy,ilayn/scipy,scipy/scipy,aarchiba/scipy,jjhelmus/scipy,pbrod/scipy,andyfaff/scipy,jor-/scipy,anntzer/scipy,tylerjereddy/scipy,ilayn/scipy,endolith/scipy,pbrod/scipy,aarchiba/scipy,Stefan-Endres/scipy,grlee77/scipy,befelix/scipy,jamestwebber/scipy,pbrod/scipy,gertingold/scipy,anntzer/scipy,e-q/scipy,jamestwebber/scipy,Eric89GXL/scipy,person142/scipy,jor-/scipy,person142/scipy,apbard/scipy,andyfaff/scipy,rgommers/scipy,jor-/scipy,andyfaff/scipy,rgommers/scipy,matthew-brett/scipy,e-q/scipy,apbard/scipy,grlee77/scipy,gertingold/scipy,aeklant/scipy,arokem/scipy,arokem/scipy,perimosocordiae/scipy,ilayn/scipy,befelix/scipy,grlee77/scipy,andyfaff/scipy,perimosocordiae/scipy,jamestwebber/scipy,apbard/scipy,pbrod/scipy,scipy/scipy,Stefan-Endres/scipy,tylerjereddy/scipy,zerothi/scipy,mdhaber/scipy,lhilt/scipy,anntzer/scipy,zerothi/scipy,gfyoung/scipy,andyfaff/scipy,vigna/scipy,lhilt/scipy,Stefan-Endres/scipy,mdhaber/scipy,jjhelmus/scipy,zerothi/scipy,arokem/scipy,nmayorov/scipy,Eric89GXL/scipy,matthew-brett/scipy,Eric89GXL/scipy,aeklant/scipy,gertingold/scipy,Stefan-Endres/scipy,befelix/scipy,perimosocordiae/scipy,gfyoung/scipy,lhilt/scipy,apbard/scipy,mdhaber/scipy,WarrenWeckesser/scipy,person142/scipy,arokem/scipy,aeklant/scipy,matthew-brett/scipy,scipy/scipy,e-q/scipy,endolith/scipy,person142/scipy,gertingold/scipy,anntzer/scipy,vigna/scipy,lhilt/scipy,josephcslater/scipy,WarrenWeckesser/scipy,vigna/scipy,endolith/scipy,jakevdp/scipy