Merge pull request #35 in ZP/z-push from bugfix/ZP-676-streamer-type-streamer_type_send_empty to develop

* commit 'e6b04fab':
  ZP-676 Removed trailing space. Released under the Affero GNU General Public License (AGPL) version 3.
  ZP-676 Fix to handle incoming STREAMER_TYPE_SEND_EMPTY property type. Released under the Affero GNU General Public License (AGPL) version 3.

(cherry picked from commit 113e7645)