components/9990-main.sh: Fix shellcheck issue SC2236
authorBenjamin Drung <benjamin.drung@profitbricks.com>
Mon, 13 Jan 2020 09:59:40 +0000 (10:59 +0100)
committerBenjamin Drung <benjamin.drung@profitbricks.com>
Mon, 13 Jan 2020 09:59:40 +0000 (10:59 +0100)
commit9b976b577df4fe25e8affc3d54c0936f96bc0c7f
tree03607278ed176ece003cd71fae7398e59c86833f
parent9c27c7a23d5b839cfefa72bfae93102fbf67d83a
components/9990-main.sh: Fix shellcheck issue SC2236

shellcheck complains about SC2236: Use -n instead of ! -z.

Signed-off-by: Benjamin Drung <benjamin.drung@profitbricks.com>
components/9990-main.sh