[PATCHv2] dracut: don't skip zero-length string outfile argument

[Amadeusz ÅoÅnowski <aidecoe@xxxxxxxxxxxx>]

When '' was passed as outfile, dracut generated name with following
pattern:

  /boot/initramfs-$kernel

With commit 486a1b9324d6fc7bc534d8147d64b8b259692c46 dracut skips ''
argument.
---
 dracut |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/dracut b/dracut
index 6b67dc0..c16b222 100755
--- a/dracut
+++ b/dracut
@@ -237,7 +237,7 @@ while (($# > 0)); do
                        ;;
         -*) printf "\nUnknown option: %s\n\n" "$1" >&2; usage; exit 1;;
         *) 
-            if ! [[ $outfile ]]; then
+            if ! [[ ${outfile+x} ]]; then
                 outfile=$1
             elif [[ $kernel = "unset" ]]; then
                 kernel=$1
-- 
1.7.4.1

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