Fixed latent bug in event_cancel where we need to check to see if the event being cancel is still in the TW_net_outq as well as other places denoting it's a remote event. If this check is not made, PHOLD seg faults.
Fixed latent bug in event_cancel where we need to check to see if the
event being cancel is still in the TW_net_outq as well as other places
denoting it's a remote event. If this check is not made, PHOLD seg faults.

This bug was always there but the prior use of the MPI layer somewhat ensure
that all send events pretty much completed before any anti-messages or cancel
messages could be sent for that event.

carothersc/ROSS,carothersc/ROSS,carothersc/ROSS