tree 67aa6600bdee35dbadbf36be635d5cc07b98a6e7
parent 3130a32fd910f424a9d6b811ed23d9a552004c81
author Sungmin Choi <sungmin.choi@lge.com> 1361774271 +0900
committer Sungmin Choi <sungmin.choi@lge.com> 1361774385 +0900

ext4_utils: fix build error without FILE_CONTEXTS

After commit 4df62f342dbbe2f5cca831ce789dc0426d32ec03,
occurs segmentation fault if mkuserimg.sh runs without FILE_CONTEXTS options.
It's due to strlen() for null value. To fix it, return 0 for null.

Change-Id: Icf99706e51b9053a24e23b9d081a258962877c30