"Bad Things" would happen if Asterisk was compiled with DEBUG_THREADS, but a
loaded module was not (or vice versa).  This also immensely simplifies the
lock code, since there are no longer 2 separate versions of them.

Review: https://reviewboard.asterisk.org/r/508/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@258557 65c4cc65-6c06-0410-ace0-fbb531ad65f3