Fix completion percentage calculation in mirror status

We sometimes record a duration even on a failed fetch attempt, such as
if we get an HTTP 404. However, we never record a last_sync value on a
failed fetch. Use this field instead to sum up the total number of
successful checks.

Signed-off-by: Dan McGee <dan@archlinux.org>

0 files changed, 0 insertions, 0 deletions