fix(load_fstype): use $1 if $2 is missing

[FGrose]

Use parameter expansion default value if the second argument is missing. The current code mistakenly reuses the null second argument.

Checklist

• [✔] I have tested it locally

[LaszloGombos]

LGTM. Thanks @FGrose and @aafeijoo-suse

[LaszloGombos]

Not sure why commit message checker test is failing.

Changing the PR commit message on the GH interface does not actually change the commit message on the commit itself. You might need to amend your commit for that.

[LaszloGombos]

LGTM