Permit the creation of just cd0 if desired. Previously it always created cd1 as well due to an off-by-one error left over from revision 1.249.
Permit the creation of just cd0 if desired. Previously it always
created cd1 as well due to an off-by-one error left over from
revision 1.249.

PR:		conf/20436
Submitted by:	Andre Albsmeier <andre.albsmeier@mchp.siemens.de>
MFC after:	1 week

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase