It is valid to lock/unlock MPI_PROC_NULL. It probably isn't work tracking
whether MPI_PROC_NULL is locked for MPI_PROC_NULL RMA operations so this
is probably the permanent solution.
Closes trac:4720
Tracking the 1.8.2 issue with this CMR.
cmr=v1.8.2:reviewer=bbenton
This commit was SVN r32011.
The following Trac tickets were found above:
Ticket 4720 --> https://svn.open-mpi.org/trac/ompi/ticket/4720