am 21d991ee: Fix crash when number is null

* commit '21d991ee8bab6e2ef7d9df0b268b39053b21cf5b':
  Fix crash when number is null
tree: 06e11a2dd9b51c29b409c6d8b92d9ffa5531f678
  1. res/
  2. src/
  3. tests/
  4. Android.mk
  5. AndroidManifest.xml
  6. proguard.flags