BUG: interpolate/sproot: initialize a variable properly (fixes #789)
BUG: interpolate/sproot: initialize a variable properly (fixes #789)

Test covered by the smoke tests in test_fitpack.py. The bug wasn't
always triggered, as `m` might be initialized to zero by accident.

rgommers/scipy,Eric89GXL/scipy,niknow/scipy,larsmans/scipy,vhaasteren/scipy,bkendzior/scipy,aeklant/scipy,pizzathief/scipy,mortada/scipy,sriki18/scipy,aarchiba/scipy,nmayorov/scipy,scipy/scipy,FRidh/scipy,anntzer/scipy,aman-iitj/scipy,grlee77/scipy,sauliusl/scipy,mikebenfield/scipy,Stefan-Endres/scipy,jonycgn/scipy,Shaswat27/scipy,jseabold/scipy,argriffing/scipy,matthew-brett/scipy,jor-/scipy,WarrenWeckesser/scipy,petebachant/scipy,mortada/scipy,behzadnouri/scipy,zerothi/scipy,trankmichael/scipy,mtrbean/scipy,nvoron23/scipy,WarrenWeckesser/scipy,petebachant/scipy,maciejkula/scipy,efiring/scipy,maniteja123/scipy,jamestwebber/scipy,arokem/scipy,dominicelse/scipy,ChanderG/scipy,kalvdans/scipy,jsilter/scipy,vanpact/scipy,mortada/scipy,Stefan-Endres/scipy,aeklant/scipy,jjhelmus/scipy,mingwpy/scipy,sargas/scipy,pyramania/scipy,sriki18/scipy,pschella/scipy,e-q/scipy,teoliphant/scipy,sauliusl/scipy,aarchiba/scipy,haudren/scipy,andim/scipy,juliantaylor/scipy,fredrikw/scipy,vigna/scipy,behzadnouri/scipy,mgaitan/scipy,pbrod/scipy,Dapid/scipy,giorgiop/scipy,scipy/scipy,nvoron23/scipy,Srisai85/scipy,sriki18/scipy,vberaudi/scipy,surhudm/scipy,Kamp9/scipy,hainm/scipy,larsmans/scipy,perimosocordiae/scipy,befelix/scipy,chatcannon/scipy,gertingold/scipy,jakevdp/scipy,vhaasteren/scipy,kleskjr/scipy,person142/scipy,gertingold/scipy,maciejkula/scipy,bkendzior/scipy,ChanderG/scipy,aman-iitj/scipy,zxsted/scipy,ortylp/scipy,chatcannon/scipy,kleskjr/scipy,petebachant/scipy,larsmans/scipy,fredrikw/scipy,Kamp9/scipy,nonhermitian/scipy,rmcgibbo/scipy,jakevdp/scipy,endolith/scipy,jsilter/scipy,mtrbean/scipy,mikebenfield/scipy,niknow/scipy,andyfaff/scipy,nmayorov/scipy,endolith/scipy,tylerjereddy/scipy,mhogg/scipy,witcxc/scipy,hainm/scipy,petebachant/scipy,mikebenfield/scipy,ogrisel/scipy,ChanderG/scipy,Dapid/scipy,Shaswat27/scipy,ortylp/scipy,nmayorov/scipy,raoulbq/scipy,hainm/scipy,Dapid/scipy,grlee77/scipy,maciejkula/scipy,sauliusl/scipy,trankmichael/scipy,richardotis/scipy,zerothi/scipy,gef756/scipy,chatcannon/scipy,cpaulik/scipy,felipebetancur/scipy,newemailjdm/scipy,vanpact/scipy,richardotis/scipy,giorgiop/scipy,anielsen001/scipy,cpaulik/scipy,ndchorley/scipy,dominicelse/scipy,futurulus/scipy,sonnyhu/scipy,Eric89GXL/scipy,pyramania/scipy,giorgiop/scipy,e-q/scipy,juliantaylor/scipy,matthew-brett/scipy,aman-iitj/scipy,WarrenWeckesser/scipy,sriki18/scipy,ilayn/scipy,newemailjdm/scipy,haudren/scipy,nvoron23/scipy,nvoron23/scipy,minhlongdo/scipy,Gillu13/scipy,pnedunuri/scipy,Newman101/scipy,witcxc/scipy,zaxliu/scipy,andyfaff/scipy,piyush0609/scipy,mhogg/scipy,argriffing/scipy,rmcgibbo/scipy,minhlongdo/scipy,andim/scipy,maniteja123/scipy,Shaswat27/scipy,Dapid/scipy,chatcannon/scipy,argriffing/scipy,lukauskas/scipy,mdhaber/scipy,lukauskas/scipy,arokem/scipy,aman-iitj/scipy,woodscn/scipy,pbrod/scipy,gef756/scipy,perimosocordiae/scipy,WillieMaddox/scipy,Gillu13/scipy,gef756/scipy,kalvdans/scipy,newemailjdm/scipy,jseabold/scipy,Stefan-Endres/scipy,matthewalbani/scipy,Stefan-Endres/scipy,anntzer/scipy,cpaulik/scipy,pnedunuri/scipy,newemailjdm/scipy,gef756/scipy,dch312/scipy,mortada/scipy,pnedunuri/scipy,andyfaff/scipy,Srisai85/scipy,raoulbq/scipy,befelix/scipy,haudren/scipy,person142/scipy,chatcannon/scipy,lhilt/scipy,mikebenfield/scipy,aman-iitj/scipy,efiring/scipy,apbard/scipy,ortylp/scipy,Kamp9/scipy,rmcgibbo/scipy,Gillu13/scipy,efiring/scipy,ChanderG/scipy,larsmans/scipy,mhogg/scipy,lukauskas/scipy,rgommers/scipy,ales-erjavec/scipy,scipy/scipy,jseabold/scipy,surhudm/scipy,teoliphant/scipy,woodscn/scipy,gertingold/scipy,jjhelmus/scipy,andyfaff/scipy,vanpact/scipy,haudren/scipy,mdhaber/scipy,zerothi/scipy,vberaudi/scipy,anntzer/scipy,sriki18/scipy,Dapid/scipy,sriki18/scipy,ilayn/scipy,behzadnouri/scipy,apbard/scipy,maciejkula/scipy,behzadnouri/scipy,giorgiop/scipy,matthewalbani/scipy,rmcgibbo/scipy,gef756/scipy,mgaitan/scipy,vberaudi/scipy,apbard/scipy,maniteja123/scipy,maniteja123/scipy,minhlongdo/scipy,mhogg/scipy,felipebetancur/scipy,pnedunuri/scipy,perimosocordiae/scipy,mortonjt/scipy,lhilt/scipy,sauliusl/scipy,zerothi/scipy,gdooper/scipy,gdooper/scipy,jseabold/scipy,sauliusl/scipy,befelix/scipy,dominicelse/scipy,ales-erjavec/scipy,rgommers/scipy,pizzathief/scipy,aeklant/scipy,Newman101/scipy,WarrenWeckesser/scipy,grlee77/scipy,fernand/scipy,endolith/scipy,Eric89GXL/scipy,kalvdans/scipy,efiring/scipy,jakevdp/scipy,sonnyhu/scipy,anielsen001/scipy,efiring/scipy,Srisai85/scipy,Kamp9/scipy,gfyoung/scipy,jor-/scipy,jsilter/scipy,mortada/scipy,endolith/scipy,anielsen001/scipy,ogrisel/scipy,vigna/scipy,fernand/scipy,nvoron23/scipy,Gillu13/scipy,jsilter/scipy,arokem/scipy,jjhelmus/scipy,ogrisel/scipy,njwilson23/scipy,ales-erjavec/scipy,Shaswat27/scipy,mdhaber/scipy,gfyoung/scipy,pbrod/scipy,fredrikw/scipy,WarrenWeckesser/scipy,befelix/scipy,matthew-brett/scipy,piyush0609/scipy,Gillu13/scipy,surhudm/scipy,WillieMaddox/scipy,aarchiba/scipy,jonycgn/scipy,vanpact/scipy,mortonjt/scipy,mortonjt/scipy,witcxc/scipy,mtrbean/scipy,njwilson23/scipy,chatcannon/scipy,WillieMaddox/scipy,futurulus/scipy,pbrod/scipy,zaxliu/scipy,zaxliu/scipy,bkendzior/scipy,zerothi/scipy,jamestwebber/scipy,josephcslater/scipy,mgaitan/scipy,dch312/scipy,raoulbq/scipy,ilayn/scipy,ndchorley/scipy,vigna/scipy,gef756/scipy,vhaasteren/scipy,mdhaber/scipy,fredrikw/scipy,anntzer/scipy,piyush0609/scipy,gertingold/scipy,andim/scipy,hainm/scipy,newemailjdm/scipy,andim/scipy,person142/scipy,pschella/scipy,sargas/scipy,jjhelmus/scipy,rgommers/scipy,piyush0609/scipy,argriffing/scipy,njwilson23/scipy,FRidh/scipy,maniteja123/scipy,apbard/scipy,Srisai85/scipy,endolith/scipy,pbrod/scipy,behzadnouri/scipy,richardotis/scipy,lhilt/scipy,Newman101/scipy,Newman101/scipy,niknow/scipy,sargas/scipy,hainm/scipy,josephcslater/scipy,jamestwebber/scipy,gdooper/scipy,ilayn/scipy,matthewalbani/scipy,pyramania/scipy,kleskjr/scipy,mingwpy/scipy,zxsted/scipy,dch312/scipy,minhlongdo/scipy,mingwpy/scipy,Newman101/scipy,vberaudi/scipy,trankmichael/scipy,mtrbean/scipy,petebachant/scipy,befelix/scipy,nvoron23/scipy,jjhelmus/scipy,teoliphant/scipy,scipy/scipy,petebachant/scipy,WillieMaddox/scipy,witcxc/scipy,Stefan-Endres/scipy,jamestwebber/scipy,ndchorley/scipy,minhlongdo/scipy,anielsen001/scipy,josephcslater/scipy,fernand/scipy,josephcslater/scipy,gdooper/scipy,perimosocordiae/scipy,andim/scipy,josephcslater/scipy,pyramania/scipy,aman-iitj/scipy,vigna/scipy,e-q/scipy,dch312/scipy,mgaitan/scipy,pizzathief/scipy,niknow/scipy,scipy/scipy,ChanderG/scipy,WarrenWeckesser/scipy,ales-erjavec/scipy,Eric89GXL/scipy,mhogg/scipy,mdhaber/scipy,vberaudi/scipy,juliantaylor/scipy,jakevdp/scipy,mortonjt/scipy,mingwpy/scipy,fredrikw/scipy,endolith/scipy,e-q/scipy,anielsen001/scipy,mingwpy/scipy,lhilt/scipy,pizzathief/scipy,Gillu13/scipy,ilayn/scipy,ilayn/scipy,jonycgn/scipy,kleskjr/scipy,kleskjr/scipy,trankmichael/scipy,tylerjereddy/scipy,mdhaber/scipy,nonhermitian/scipy,ogrisel/scipy,jonycgn/scipy,woodscn/scipy,woodscn/scipy,grlee77/scipy,piyush0609/scipy,apbard/scipy,pnedunuri/scipy,Dapid/scipy,ogrisel/scipy,vberaudi/scipy,andim/scipy,pschella/scipy,nmayorov/scipy,niknow/scipy,jonycgn/scipy,futurulus/scipy,Kamp9/scipy,felipebetancur/scipy,ndchorley/scipy,haudren/scipy,mortada/scipy,pschella/scipy,sonnyhu/scipy,jor-/scipy,trankmichael/scipy,lukauskas/scipy,ortylp/scipy,FRidh/scipy,zerothi/scipy,sonnyhu/scipy,mingwpy/scipy,vhaasteren/scipy,zxsted/scipy,nonhermitian/scipy,giorgiop/scipy,lhilt/scipy,jakevdp/scipy,efiring/scipy,e-q/scipy,scipy/scipy,aarchiba/scipy,juliantaylor/scipy,teoliphant/scipy,ortylp/scipy,gfyoung/scipy,jamestwebber/scipy,njwilson23/scipy,FRidh/scipy,zxsted/scipy,bkendzior/scipy,njwilson23/scipy,raoulbq/scipy,perimosocordiae/scipy,Newman101/scipy,raoulbq/scipy,pschella/scipy,futurulus/scipy,tylerjereddy/scipy,dch312/scipy,jsilter/scipy,rgommers/scipy,mtrbean/scipy,argriffing/scipy,nonhermitian/scipy,person142/scipy,mtrbean/scipy,teoliphant/scipy,FRidh/scipy,jor-/scipy,lukauskas/scipy,futurulus/scipy,rmcgibbo/scipy,fernand/scipy,sonnyhu/scipy,behzadnouri/scipy,woodscn/scipy,grlee77/scipy,Srisai85/scipy,gertingold/scipy,tylerjereddy/scipy,felipebetancur/scipy,piyush0609/scipy,zaxliu/scipy,nonhermitian/scipy,mortonjt/scipy,rmcgibbo/scipy,jonycgn/scipy,matthewalbani/scipy,mikebenfield/scipy,perimosocordiae/scipy,sargas/scipy,njwilson23/scipy,anntzer/scipy,felipebetancur/scipy,kleskjr/scipy,surhudm/scipy,vanpact/scipy,pbrod/scipy,gdooper/scipy,cpaulik/scipy,bkendzior/scipy,pnedunuri/scipy,haudren/scipy,ortylp/scipy,aarchiba/scipy,juliantaylor/scipy,mgaitan/scipy,mgaitan/scipy,vhaasteren/scipy,futurulus/scipy,felipebetancur/scipy,Eric89GXL/scipy,zxsted/scipy,vigna/scipy,anntzer/scipy,fredrikw/scipy,jor-/scipy,arokem/scipy,mhogg/scipy,WillieMaddox/scipy,maciejkula/scipy,sonnyhu/scipy,arokem/scipy,zaxliu/scipy,ChanderG/scipy,ales-erjavec/scipy,anielsen001/scipy,matthewalbani/scipy,dominicelse/scipy,cpaulik/scipy,kalvdans/scipy,gfyoung/scipy,niknow/scipy,vhaasteren/scipy,raoulbq/scipy,woodscn/scipy,person142/scipy,aeklant/scipy,Srisai85/scipy,ndchorley/scipy,Stefan-Endres/scipy,pyramania/scipy,matthew-brett/scipy,fernand/scipy,hainm/scipy,witcxc/scipy,Shaswat27/scipy,trankmichael/scipy,Eric89GXL/scipy,richardotis/scipy,jseabold/scipy,jseabold/scipy,zxsted/scipy,gfyoung/scipy,lukauskas/scipy,vanpact/scipy,zaxliu/scipy,Kamp9/scipy,richardotis/scipy,matthew-brett/scipy,ndchorley/scipy,fernand/scipy,nmayorov/scipy,tylerjereddy/scipy,andyfaff/scipy,sargas/scipy,giorgiop/scipy,aeklant/scipy,andyfaff/scipy,pizzathief/scipy,surhudm/scipy,kalvdans/scipy,ales-erjavec/scipy,Shaswat27/scipy,dominicelse/scipy,larsmans/scipy,larsmans/scipy,minhlongdo/scipy,sauliusl/scipy,surhudm/scipy,richardotis/scipy,maniteja123/scipy,mortonjt/scipy,argriffing/scipy,newemailjdm/scipy,FRidh/scipy,cpaulik/scipy,WillieMaddox/scipy