Use NOT_A_DICT_POS instead of 0 to express not valid ditctionary position.

Bug: 6669677
Change-Id: I4bf2284f8221a0a2ae4534b4a06b0e59c420a5f9
3 files changed
tree: d75e1bde8a192ba2233f6f8e197b6158c7ba2b81
  1. dictionaries/
  2. java/
  3. native/
  4. tests/
  5. tools/
  6. Android.mk
  7. CleanSpec.mk