Improve getting delivery cost (fixes case when weight is 0)
Improve getting delivery cost (fixes case when weight is 0)

taedori81/saleor,laosunhust/saleor,car3oon/saleor,HyperManTT/ECommerceSaleor,laosunhust/saleor,avorio/saleor,paweltin/saleor,paweltin/saleor,avorio/saleor,avorio/saleor,maferelo/saleor,itbabu/saleor,HyperManTT/ECommerceSaleor,taedori81/saleor,UITools/saleor,spartonia/saleor,Drekscott/Motlaesaleor,UITools/saleor,arth-co/saleor,josesanch/saleor,itbabu/saleor,dashmug/saleor,HyperManTT/ECommerceSaleor,dashmug/saleor,hongquan/saleor,KenMutemi/saleor,KenMutemi/saleor,rchav/vinerack,KenMutemi/saleor,spartonia/saleor,jreigel/saleor,arth-co/saleor,josesanch/saleor,mociepka/saleor,Drekscott/Motlaesaleor,taedori81/saleor,arth-co/saleor,UITools/saleor,spartonia/saleor,mociepka/saleor,car3oon/saleor,rodrigozn/CW-Shop,laosunhust/saleor,tfroehlich82/saleor,tfroehlich82/saleor,arth-co/saleor,jreigel/saleor,laosunhust/saleor,hongquan/saleor,rodrigozn/CW-Shop,UITools/saleor,rchav/vinerack,taedori81/saleor,paweltin/saleor,itbabu/saleor,Drekscott/Motlaesaleor,paweltin/saleor,hongquan/saleor,maferelo/saleor,dashmug/saleor,car3oon/saleor,josesanch/saleor,spartonia/saleor,jreigel/saleor,maferelo/saleor,tfroehlich82/saleor,Drekscott/Motlaesaleor,UITools/saleor,mociepka/saleor,rodrigozn/CW-Shop,rchav/vinerack,avorio/saleor