mkfs.f2fs: avoid memory leak in mkfs
mkfs.f2fs: avoid memory leak in mkfs

This patch fixes memory leak in mkfs.

Change-Id: I71fbdbcefde309e044e4b578652f5764f643da5c
Signed-off-by: Chao Yu <0cc5db7488e13b393f245aa6263acec5e92fdcc5@samsung.com>
Signed-off-by: Jaegeuk Kim <71255387a32c360dfbe6dfb7aaeb123bf1dc8cb6@kernel.org>

schqiushui/android_external_f2fs-tools,schqiushui/android_external_f2fs-tools