BUG: sparse: fix dok_matrix empty return
BUG: sparse: fix dok_matrix empty return

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