fix #948 issue -- Using unititialized value in unittest.
fix SetOption scc ltr_ref_num casued memory leak issue.
Merge pull request #966 from lyao2/scc_ltr_num_setoption

fix SetOption scc ltr_ref_num casued memory leak issue.
Merge pull request #965 from ruil2/uinit_fix

fix #948 issue -- Using unititialized value in unittest.
Merge remote-tracking branch 'upstream/master' into travis.osx