Even though the get_channel_by_name() API advertised that you could search by
name or uniqueid (just as the old API did), searching by uniqueid was not
actually implemented.  This patch fixes that problem.

The ast_channel_get_full() function now makes a second search attempt by
uniqueid if the parameter was a name.  The channel comparison function also
now knows how to compare by unqieueid.

Finally, a bug was fixed in passing where OBJ_POINTER was being passed in some
scenarios where it should not have been.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@211390 65c4cc65-6c06-0410-ace0-fbb531ad65f3