Resolve some errors that occur on a graceful shutdown.

Resolve some errors that occur on a graceful shutdown.

Don't Finalize() if Initialize() did not succeed.  This resulted in an error
about trying to Finalize() an invalid handle.

Also trim some trailing whitespace while in the area.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@271867 65c4cc65-6c06-0410-ace0-fbb531ad65f3