Ensure pkgbase/epoch are defined before doing anything

When generating integrity sums, we could get some weird output before due to
epoch being uninitialized:

    /usr/bin/makepkg: line 234: [[: 2.6.37: syntax error: invalid arithmetic operator (error token is ".6.37")

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

0 files changed, 0 insertions, 0 deletions