Merge "sdcard: avoid benign unsigned overflow" am: 64461c2 am: 182b310
am: e307f76

* commit 'e307f769f1a423cff3bca30f824c92db921c2e81':
  sdcard: avoid benign unsigned overflow

Change-Id: I6a639bb20c51bb2f2370b4ec5db73e0fc3b2e848