Move null checks to bvector utility callers

It's generally ok to encounter basic blocks with no interesting
dataflow info, but better to skip in the callers of the utilities
than in the utilities themselves (to make it explicit).

Change-Id: I27b2c774381d4315d51436527ddf0378e5c05d32
3 files changed
tree: f3facf847f4c6a6232a0d868596c7ab1414e5e6e
  2. build/
  3. oat_process/
  4. oat_runtime/
  5. src/
  6. test/
  7. tools/