Fix compilation error introduced in previous commit

Also take advantage of this and remove some warnings.

Change-Id: I0d4e7ed860f2881c00845eb9a06eea41ad85b4fc
Merge pull request #367 from vovythevov/RemoveWarnings

Fix compilation error introduced in previous commit
Fix Display tubes by default
Merge branch 'DisplayTubesByDefault'

* DisplayTubesByDefault:
  Fix Display tubes by default