die if '-' is given with empty stdin

Several operations default to all packages/repos/etc if no targets are
provided.  If a user provides '-' they almost certainly expect there to
be targets on stdin and will be surprised if pacman falls back to the
default because there are none.

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
Signed-off-by: Allan McRae <allan@archlinux.org>

0 files changed, 0 insertions, 0 deletions