[PATCH] expand-on-first-boot: Fix early exit in helper script

[Uladzimir Bely <ubely@ilbers.de>]

Changes in 342a751e introduced a regression when error from 'find'
makes helper script early exit (with -1 error code) just after an
attempt to assign ROOT_DEV_SLAVE variable. So, the last partition
remained not resized.

Passing 'find' output to 'head -1' masks possible error from 'find'
without breaking the logic and continues the script execution.

Signed-off-by: Uladzimir Bely <ubely@ilbers.de>
---
 .../expand-on-first-boot/files/expand-last-partition.sh         | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/meta/recipes-support/expand-on-first-boot/files/expand-last-partition.sh b/meta/recipes-support/expand-on-first-boot/files/expand-last-partition.sh
index f3e29a1c..934a014f 100755
--- a/meta/recipes-support/expand-on-first-boot/files/expand-last-partition.sh
+++ b/meta/recipes-support/expand-on-first-boot/files/expand-last-partition.sh
@@ -11,7 +11,7 @@ set -e
 
 ROOT_DEV="$(findmnt / -o source -n)"
 ROOT_DEV_NAME=${ROOT_DEV##*/}
-ROOT_DEV_SLAVE=$(find /sys/block/"${ROOT_DEV_NAME}"/slaves -mindepth 1 -print -quit 2>/dev/null)
+ROOT_DEV_SLAVE=$(find /sys/block/"${ROOT_DEV_NAME}"/slaves -mindepth 1 -print -quit 2>/dev/null | head -1)
 if [ -n "${ROOT_DEV_SLAVE}" ]; then
 	ROOT_DEV=/dev/${ROOT_DEV_SLAVE##*/}
 fi
-- 
2.20.1