location-importer.in: Braindead me accidentally forgot a "break" statement

location-importer.in: Braindead me accidentally forgot a "break" statement

This one apparently went down the drain between these two patches:
- https://patchwork.ipfire.org/project/location/patch/20210522125758.28770-1-peter.mueller@ipfire.org/
- https://patchwork.ipfire.org/project/location/patch/aefd1904-4b38-f5cf-ab1d-9d69636cf914@ipfire.org/

Due to other safeguards, the current damage in production is limited to:

location=# SELECT * FROM networks WHERE country = 'ZZ';
      network       | country | original_countries | source
--------------------+---------+--------------------+--------
 130.195.64.0/19    | ZZ      | {ZZ}               | APNIC
 130.195.96.0/19    | ZZ      | {ZZ}               | APNIC
 122.252.24.0/21    | ZZ      | {ZZ}               | APNIC
 2406:840:10::/48   | ZZ      | {ZZ}               | APNIC
 2406:840:fd0f::/48 | ZZ      | {ZZ}               | APNIC
(5 rows)

Fixes: #12673
Signed-off-by: Peter Müller <peter.mueller@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>