fix None argument error
fix None argument error

snyderr/robotframework,alexandrul-ci/robotframework,edbrannin/robotframework,rwarren14/robotframework,xiaokeng/robotframework,JackNokia/robotframework,edbrannin/robotframework,kurtdawg24/robotframework,snyderr/robotframework,yahman72/robotframework,SivagnanamCiena/robotframework,userzimmermann/robotframework,un33k/robotframework,suvarnaraju/robotframework,rwarren14/robotframework,yonglehou/robotframework,kurtdawg24/robotframework,wojciechtanski/robotframework,suvarnaraju/robotframework,edbrannin/robotframework,jaloren/robotframework,stasiek/robotframework,yonglehou/robotframework,ashishdeshpande/robotframework,rwarren14/robotframework,nmrao/robotframework,synsun/robotframework,edbrannin/robotframework,fingeronthebutton/robotframework,snyderr/robotframework,alexandrul-ci/robotframework,fingeronthebutton/robotframework,SivagnanamCiena/robotframework,alexandrul-ci/robotframework,moto-timo/robotframework,fingeronthebutton/robotframework,yahman72/robotframework,kurtdawg24/robotframework,eric-stanley/robotframework,HelioGuilherme66/robotframework,synsun/robotframework,fingeronthebutton/robotframework,userzimmermann/robotframework,stasiek/robotframework,Colorfulstan/robotframework,ashishdeshpande/robotframework,jaloren/robotframework,userzimmermann/robotframework,kurtdawg24/robotframework,userzimmermann/robotframework,jaloren/robotframework,kyle1986/robortframe,jorik041/robotframework,JackNokia/robotframework,joongh/robotframework,un33k/robotframework,JackNokia/robotframework,xiaokeng/robotframework,kyle1986/robortframe,yahman72/robotframework,moto-timo/robotframework,Colorfulstan/robotframework,kurtdawg24/robotframework,yahman72/robotframework,joongh/robotframework,JackNokia/robotframework,eric-stanley/robotframework,suvarnaraju/robotframework,jaloren/robotframework,userzimmermann/robotframework,alexandrul-ci/robotframework,ChrisHirsch/robotframework,wojciechtanski/robotframework,moto-timo/robotframework,xiaokeng/robotframework,ChrisHirsch/robotframework,synsun/robotframework,HelioGuilherme66/robotframework,JackNokia/robotframework,suvarnaraju/robotframework,kyle1986/robortframe,alexandrul-ci/robotframework,suvarnaraju/robotframework,yonglehou/robotframework,ChrisHirsch/robotframework,dkentw/robotframework,HelioGuilherme66/robotframework,nmrao/robotframework,ChrisHirsch/robotframework,yonglehou/robotframework,robotframework/robotframework,un33k/robotframework,jorik041/robotframework,stasiek/robotframework,nmrao/robotframework,SivagnanamCiena/robotframework,ChrisHirsch/robotframework,Colorfulstan/robotframework,wojciechtanski/robotframework,dkentw/robotframework,moto-timo/robotframework,joongh/robotframework,rwarren14/robotframework,eric-stanley/robotframework,stasiek/robotframework,edbrannin/robotframework,dkentw/robotframework,ashishdeshpande/robotframework,jorik041/robotframework,robotframework/robotframework,yahman72/robotframework,joongh/robotframework,eric-stanley/robotframework,wojciechtanski/robotframework,synsun/robotframework,jorik041/robotframework,un33k/robotframework,SivagnanamCiena/robotframework,stasiek/robotframework,ashishdeshpande/robotframework,synsun/robotframework,nmrao/robotframework,jaloren/robotframework,dkentw/robotframework,fingeronthebutton/robotframework,xiaokeng/robotframework,rwarren14/robotframework,wojciechtanski/robotframework,SivagnanamCiena/robotframework,un33k/robotframework,ashishdeshpande/robotframework,Colorfulstan/robotframework,kyle1986/robortframe,snyderr/robotframework,snyderr/robotframework,Colorfulstan/robotframework,robotframework/robotframework,moto-timo/robotframework,xiaokeng/robotframework,kyle1986/robortframe,yonglehou/robotframework,dkentw/robotframework,nmrao/robotframework,joongh/robotframework,jorik041/robotframework