tile endpoint does not work if tile-size is larger than one of the orientation axes

[aschampion]

No matter resolution, x_idx, y_idx, z_idx parameters, always receive a 400 when querying the xz/yz planes if the tile size is larger than the z dimension:

curl 'https://api.boss.neurodata.io/v1/tile/kharris15/apical/em/yz/256/0/0/0/0' -H 'Accept-Encoding: gzip, deflate, br' -H 'Accept: */*' -H 'Authorization: Token *snip*'

{"status": 400, "code": 1001, "message": "Incorrect cutout arguments 0/0/0/0"}

If the tile size is reduced to 32, works:

curl 'https://api.boss.neurodata.io/v1/tile/kharris15/apical/em/yz/32/0/0/0/0' -H 'Accept-Encoding: gzip, deflate, br' -H 'Accept: */*' -H 'Authorization: Token *snip*'