firdes: Fixed trailing whitespace in qa_firdes.cc.

Signed-off-by: Moritz Fischer <moritz@ettus.com>
firdes: Reset stream precision when done.

Fixes CID 1132150.

Signed-off-by: Moritz Fischer <moritz@ettus.com>
firdes: cleaned up compiler warning on static function not used.
Merge branch 'master' into next