fix(lua): fix scanner.c compile error
fix(lua): fix scanner.c compile error

Whatever `cc` is in the CI environment doesn't like having a label right
before a declaration:

    error: a label can only be part of a statement and a declaration is not a statement

As seen here:

    https://github.com/wincent/command-t/runs/7590715094?check_suite_focus=true

I could hoist the declaration up the top, but in general I have been
keep declarations close to their usage sites, so I am just inserting a
no-op statement at the label instead.

wincent/command-t,wincent/command-t,wincent/command-t