Print error on duplicated database entries

Some users reported duplicated database entries in /var/lib/pacman/local/,
for example, both foo-1.0-1 and foo-2.0-1 subdirectories existed. (Bogus
3rd-party scripts, backup?) In this case pacman reported no error and its
behaviour was mysterious.

From now on, pacman detects this situation and prints an error message.

Signed-off-by: Nagy Gabor <ngaba@bibl.u-szeged.hu>
Signed-off-by: Dan McGee <dan@archlinux.org>

0 files changed, 0 insertions, 0 deletions