makepkg: refactor sanity checking into a function

No new checks, just move it into a function and return 1 rather than exit
directly. This also allows the use of local variables.

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

0 files changed, 0 insertions, 0 deletions