Even more changes concerning r187426. Revised where locks are placed yet once...

Even more changes concerning r187426. Revised where locks are placed yet once again.  ast_call() should not be called with a channel locked.  could cause deadlock issues with local channels. 


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@187673 65c4cc65-6c06-0410-ace0-fbb531ad65f3