Fix the do-we-have-a-subsig test so it doesn't drop 0-arity subsignatures.
Fix the do-we-have-a-subsig test so it doesn't drop 0-arity subsignatures.

tony-o/rakudo,retupmoca/rakudo,dankogai/rakudo,nbrown/rakudo,dwarring/rakudo,nunorc/rakudo,usev6/rakudo,raydiak/rakudo,samcv/rakudo,paultcochrane/rakudo,ugexe/rakudo,MasterDuke17/rakudo,nbrown/rakudo,nbrown/rakudo,ungrim97/rakudo,tbrowder/rakudo,MasterDuke17/rakudo,niner/rakudo,tbrowder/rakudo,awwaiid/rakudo,ab5tract/rakudo,lucasbuchala/rakudo,sergot/rakudo,laben/rakudo,tony-o/deb-rakudodaily,lucasbuchala/rakudo,LLFourn/rakudo,nbrown/rakudo,rakudo/rakudo,jonathanstowe/rakudo,awwaiid/rakudo,teodozjan/rakudo,b2gills/rakudo,ab5tract/rakudo,raydiak/rakudo,Gnouc/rakudo,b2gills/rakudo,salortiz/rakudo,labster/rakudo,cygx/rakudo,zostay/rakudo,dwarring/rakudo,samcv/rakudo,rjbs/rakudo,usev6/rakudo,teodozjan/rakudo,nbrown/rakudo,Leont/rakudo,sergot/rakudo,softmoth/rakudo,cygx/rakudo,paultcochrane/rakudo,sergot/rakudo,ungrim97/rakudo,MasterDuke17/rakudo,lucasbuchala/rakudo,azawawi/rakudo,rjbs/rakudo,niner/rakudo,sergot/rakudo,niner/rakudo,Gnouc/rakudo,cygx/rakudo,skids/rakudo,salortiz/rakudo,zostay/rakudo,nunorc/rakudo,ab5tract/rakudo,cognominal/rakudo,tony-o/deb-rakudodaily,paultcochrane/rakudo,dwarring/rakudo,jonathanstowe/rakudo,ungrim97/rakudo,pmurias/rakudo,dankogai/rakudo,Gnouc/rakudo,raydiak/rakudo,cognominal/rakudo,tony-o/rakudo,softmoth/rakudo,ungrim97/rakudo,sjn/rakudo,nunorc/rakudo,usev6/rakudo,paultcochrane/rakudo,tony-o/deb-rakudodaily,awwaiid/rakudo,cognominal/rakudo,skids/rakudo,azawawi/rakudo,ugexe/rakudo,ab5tract/rakudo,azawawi/rakudo,laben/rakudo,samcv/rakudo,zhuomingliang/rakudo,LLFourn/rakudo,b2gills/rakudo,salortiz/rakudo,cygx/rakudo,laben/rakudo,pmurias/rakudo,dankogai/rakudo,MasterDuke17/rakudo,awwaiid/rakudo,softmoth/rakudo,cygx/rakudo,retupmoca/rakudo,LLFourn/rakudo,Leont/rakudo,sjn/rakudo,softmoth/rakudo,labster/rakudo,MasterDuke17/rakudo,tony-o/deb-rakudodaily,rakudo/rakudo,niner/rakudo,azawawi/rakudo,cognominal/rakudo,teodozjan/rakudo,zhuomingliang/rakudo,LLFourn/rakudo,lucasbuchala/rakudo,rakudo/rakudo,salortiz/rakudo,sjn/rakudo,tbrowder/rakudo,dankogai/rakudo,zhuomingliang/rakudo,tbrowder/rakudo,retupmoca/rakudo,zostay/rakudo,ab5tract/rakudo,sjn/rakudo,lucasbuchala/rakudo,nbrown/rakudo,retupmoca/rakudo,tony-o/deb-rakudodaily,MasterDuke17/rakudo,nunorc/rakudo,rakudo/rakudo,jonathanstowe/rakudo,pmurias/rakudo,awwaiid/rakudo,tony-o/deb-rakudodaily,samcv/rakudo,tony-o/rakudo,labster/rakudo,zhuomingliang/rakudo,tony-o/deb-rakudodaily,ugexe/rakudo,paultcochrane/rakudo,rakudo/rakudo,tbrowder/rakudo,dwarring/rakudo,softmoth/rakudo,skids/rakudo,dankogai/rakudo,Gnouc/rakudo,zostay/rakudo,usev6/rakudo,labster/rakudo,salortiz/rakudo,ugexe/rakudo,tony-o/rakudo,rjbs/rakudo,Gnouc/rakudo,samcv/rakudo,ungrim97/rakudo,ugexe/rakudo,Leont/rakudo,labster/rakudo,jonathanstowe/rakudo,teodozjan/rakudo,Leont/rakudo,salortiz/rakudo,rakudo/rakudo,azawawi/rakudo,usev6/rakudo,laben/rakudo,pmurias/rakudo,labster/rakudo,tbrowder/rakudo,skids/rakudo,b2gills/rakudo,tony-o/rakudo,LLFourn/rakudo,Gnouc/rakudo,jonathanstowe/rakudo,b2gills/rakudo,sjn/rakudo,skids/rakudo,raydiak/rakudo,tony-o/rakudo,cognominal/rakudo