inaccurate errors for top/bottom with N=0

[Dieterbe]

when selecting top(value,0) or bottom(value,0) it returns Internal Error: runtime error: index out of range. which is not very descriptive.
it should be something like Error: should at least return 1 value or Error: count should be 1 or higher or something.

$ cat influx-issue-988.sql
create db issue-988
\db issue-988
bind
insert into demo values (60000, 0, 10)
insert into demo values (120000, 0, 10)
insert into demo values (300000, 0, 10)
select * from demo
select time, top(value,0) from demo group by time(60s) fill(null) where time > 60s and time < 300s
select time, top(value,1) from demo group by time(60s) fill(null) where time > 60s and time < 300s
select time, bottom(value,0) from demo group by time(60s) fill(null) where time > 60s and time < 300s
select time, bottom(value,1) from demo group by time(60s) fill(null) where time > 60s and time < 300s
delete db issue-988
$ cat influx-issue-988.sql | influx-cli
create db issue-988
\db issue-988
bind
insert into demo values (60000, 0, 10)
insert into demo values (120000, 0, 10)
insert into demo values (300000, 0, 10)
select * from demo
## demo
                time sequence_number               value
       300000.000000        0.000000           10.000000
       120000.000000        0.000000           10.000000
        60000.000000        0.000000           10.000000
select time, top(value,0) from demo group by time(60s) fill(null) where time > 60s and time < 300s
Server returned (400): Internal Error: runtime error: index out of range
select time, top(value,1) from demo group by time(60s) fill(null) where time > 60s and time < 300s
## demo
                time                 top
       300000.000000                  10
       240000.000000               <nil>
       180000.000000               <nil>
       120000.000000                  10
        60000.000000                  10
select time, bottom(value,0) from demo group by time(60s) fill(null) where time > 60s and time < 300s
Server returned (400): Internal Error: runtime error: index out of range
select time, bottom(value,1) from demo group by time(60s) fill(null) where time > 60s and time < 300s
## demo
                time              bottom
       300000.000000                  10
       240000.000000               <nil>
       180000.000000               <nil>
       120000.000000                  10
        60000.000000                  10
delete db issue-988