roachpb: remove useless nil check
roachpb: remove useless nil check

maxlang/cockroach,cuongdo/cockroach,cuongdo/cockroach,bg451/cockroach,nieyy/cockroach,petermattis/cockroach,cockroachdb/cockroach,maxlang/cockroach,mbertschler/cockroach,cuongdo/cockroach,mbertschler/cockroach,cuongdo/cockroach,mbertschler/cockroach,vivekmenezes/cockroach,mbertschler/cockroach,sunya123/cockroach,nieyy/cockroach,veteranlu/cockroach,petermattis/cockroach,paperstreet/cockroach,vivekmenezes/cockroach,il9ue/cockroach,il9ue/cockroach,glycerine/cockroach,nieyy/cockroach,vaibhavarora/cockroach,petermattis/cockroach,vivekmenezes/cockroach,veteranlu/cockroach,petermattis/cockroach,marcuswestin/cockroach,cuongdo/cockroach,sunya123/cockroach,il9ue/cockroach,vivekmenezes/cockroach,vaibhavarora/cockroach,mbertschler/cockroach,marcuswestin/cockroach,il9ue/cockroach,veteranlu/cockroach,arjun4084346/cockroach,vaibhavarora/cockroach,petermattis/cockroach,veteranlu/cockroach,mbertschler/cockroach,vivekmenezes/cockroach,bg451/cockroach,glycerine/cockroach,glycerine/cockroach,cockroachdb/cockroach,paperstreet/cockroach,bg451/cockroach,paperstreet/cockroach,marcuswestin/cockroach,veteranlu/cockroach,il9ue/cockroach,arjun4084346/cockroach,glycerine/cockroach,maxlang/cockroach,cockroachdb/cockroach,vaibhavarora/cockroach,sunya123/cockroach,bg451/cockroach,cockroachdb/cockroach,sunya123/cockroach,paperstreet/cockroach,il9ue/cockroach,vivekmenezes/cockroach,marcuswestin/cockroach,veteranlu/cockroach,maxlang/cockroach,arjun4084346/cockroach,paperstreet/cockroach,marcuswestin/cockroach,nieyy/cockroach,maxlang/cockroach,petermattis/cockroach,marcuswestin/cockroach,arjun4084346/cockroach,glycerine/cockroach,maxlang/cockroach,nieyy/cockroach,vaibhavarora/cockroach,paperstreet/cockroach,cockroachdb/cockroach,veteranlu/cockroach,vaibhavarora/cockroach,cuongdo/cockroach,vivekmenezes/cockroach,bg451/cockroach,bg451/cockroach,arjun4084346/cockroach,vivekmenezes/cockroach,arjun4084346/cockroach,cockroachdb/cockroach,sunya123/cockroach,il9ue/cockroach,glycerine/cockroach,marcuswestin/cockroach,cuongdo/cockroach,vaibhavarora/cockroach,sunya123/cockroach,nieyy/cockroach,maxlang/cockroach,il9ue/cockroach,nieyy/cockroach,arjun4084346/cockroach,petermattis/cockroach,paperstreet/cockroach,paperstreet/cockroach,sunya123/cockroach,marcuswestin/cockroach,glycerine/cockroach,sunya123/cockroach,petermattis/cockroach,veteranlu/cockroach,bg451/cockroach,cockroachdb/cockroach,cockroachdb/cockroach,cuongdo/cockroach,nieyy/cockroach,vaibhavarora/cockroach,glycerine/cockroach,mbertschler/cockroach,maxlang/cockroach,arjun4084346/cockroach