After commit df99495b82 pacman downloaded files from the first repo only,
and reported corrupted packages for all files from other repos.
The download_size was set to 0 for _all_ transaction packages after
downloading some files from the first repo. This code-block was moved to its
correct place.
Signed-off-by: Nagy Gabor <ngaba@bibl.u-szeged.hu>
Signed-off-by: Dan McGee <dan@archlinux.org>