makepkg: fix PKGBUILD sanity check

If PKGBUILD was good, the "insane" variable was not defined and so
the if statement failed.  Simplify and fix this check.

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

scripts/makepkg.sh.in

@@ -1630,10 +1630,7 @@ if [ "$(type -t package)" = "function" ]; then
 fi
 
 # check the PKGBUILD for some basic requirements
-check_sanity || insane=1
-if [ $insane -eq 1 ]; then
-	exit 1
-fi
+check_sanity || exit 1
 
 # We need to run devel_update regardless of whether we are in the fakeroot
 # build process so that if the user runs makepkg --forcever manually, we