When a conversion completes successfully and finds that a cancel
of the convert is still in progress (which is now a moot point),
preemptively clear the state associated with outstanding cancel.
That state could cause a subsequent conversion to be ignored.
Also, improve the consistency and content of error and debug
messages in this area.
Signed-off-by: David Teigland <teigland@redhat.com>
43279e5376