Fix crash when using external downloader

Commit 9d96bed9 attempts to use the same effective URL for the db and its
signature download.  However, this information is not available when we use
an external downloader, resulting in a crash.

Fall back to the old method when the effective URL is unavailable.

Signed-off-by: Allan McRae <allan@archlinux.org>

0 files changed, 0 insertions, 0 deletions