Coverity fixes from Nelson

Coverity fixes from Nelson

* merges: (27 commits)
  Coverity fixes. Replace UNUSED with SXE_UNUSED since some system includes (like sox.h) define it in an incompatible fashion
  Coverity fixes
  [ Replace this line with a one-line summary of the changes ]
  Coverity fixes
  Coverity fixes
  Coverity fixes
  Coverity fixes
  Coverity changes
  Coverity fixes
  Coverity fixes
  Coverity fixes
  Coverity fixes
  Coverity fixes
  Coverity fixes
  Coverity fixes
  Coverity fixes
  Coverity fixes
  Coverity fixes
  Coverity fixes
  Coverity fixes.
  ...