There is no need to use the struct ast_party_connected_line.source update values.

The messages sent by a technology when a connected line update is received
are best determined by the current call state of the channel.  The struct
ast_party_connected_line.source value is really only useful as a possible
tracing aid.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@190517 65c4cc65-6c06-0410-ace0-fbb531ad65f3