query-result-set.hh: Add result_set_row::has() helper
query-result-set.hh: Add result_set_row::has() helper

Signed-off-by: Pekka Enberg <add4fcd06328a394f0ad91feda7ee057316dc5ed@cloudius-systems.com>

aruanruan/scylla,bowlofstew/scylla,capturePointer/scylla,avikivity/scylla,senseb/scylla,gwicke/scylla,justintung/scylla,duarten/scylla,stamhe/scylla,acbellini/scylla,avikivity/scylla,rentongzhang/scylla,acbellini/scylla,bowlofstew/scylla,glommer/scylla,victorbriz/scylla,avikivity/scylla,glommer/scylla,senseb/scylla,acbellini/scylla,phonkee/scylla,wildinto/scylla,glommer/scylla,linearregression/scylla,kjniemi/scylla,senseb/scylla,tempbottle/scylla,raphaelsc/scylla,rluta/scylla,respu/scylla,rentongzhang/scylla,gwicke/scylla,dwdm/scylla,guiquanz/scylla,scylladb/scylla,stamhe/scylla,scylladb/scylla,capturePointer/scylla,rentongzhang/scylla,victorbriz/scylla,linearregression/scylla,wildinto/scylla,capturePointer/scylla,kangkot/scylla,phonkee/scylla,respu/scylla,shaunstanislaus/scylla,duarten/scylla,respu/scylla,shaunstanislaus/scylla,raphaelsc/scylla,victorbriz/scylla,rluta/scylla,aruanruan/scylla,phonkee/scylla,eklitzke/scylla,asias/scylla,dwdm/scylla,scylladb/scylla,stamhe/scylla,kangkot/scylla,kjniemi/scylla,linearregression/scylla,justintung/scylla,wildinto/scylla,duarten/scylla,tempbottle/scylla,justintung/scylla,bowlofstew/scylla,asias/scylla,rluta/scylla,raphaelsc/scylla,guiquanz/scylla,eklitzke/scylla,eklitzke/scylla,asias/scylla,shaunstanislaus/scylla,guiquanz/scylla,tempbottle/scylla,dwdm/scylla,kangkot/scylla,gwicke/scylla,aruanruan/scylla,kjniemi/scylla,scylladb/scylla