25c0bd9274
There are two problem cases:
1) the drag "fake-located" the playhead, but a redraw happens before the locate itself finishes.
2) the transport emits Session::PositionChanged from Session::non_realtime_stop(), even though
this is occuring in the "middle" of the locate process (we stop first).
In the first case, the drag code sets _pending_locate_request, since we need this to be true even
before the queued SessionEvent for the locate has been processed. So to deal with this case
In the second case, we use Session::locate_initiated() to decide if we're in the middle of a locate.
Please see the Ardour web site at http://ardour.org/ for all documentation..
For information on building ardour:
http://ardour.org/development.html