pkgmk: fix the up-to-date option (avoid unnecesarry rebuilds)

build_needed() function returns true/yes if a source is missing,
even when the target/package exists and is up-to-date. This
behaviour triggers unnecesarry rebuilds.

Because only the remote sources can be missing and
we don't want to rebuild a port just because we've deleted
some of its remote sources, this patch changes that condition
from:
    ( the source is missing OR  is newer than the target/package )
to
    ( the source exists     AND is newer than the target/package )

1 files changed, 1 insertions, 1 deletions

diff --git a/pkgmk.in b/pkgmk.in
index e5fb4f84..251a5770 100755
--- a/pkgmk.in
+++ b/pkgmk.in
@@ -656,7 +656,7 @@ build_needed() {
 		RESULT="no"
 		for FILE in $PKGMK_PKGFILE ${source[@]}; do
 			FILE=`get_filename $FILE`
-			if [ ! -e $FILE ] || [ ! $TARGET -nt $FILE ]; then
+			if [ -e $FILE ] && [ ! $TARGET -nt $FILE ]; then
 				RESULT="yes"
 				break
 			fi