Restrict iteration in the next XdrIO loop
Restrict iteration in the next XdrIO loop

Same operation as the previous commit, just broken up to make bisecting
easier if necessary

roystgnr/libmesh,jwpeterson/libmesh,capitalaslash/libmesh,capitalaslash/libmesh,jwpeterson/libmesh,BalticPinguin/libmesh,BalticPinguin/libmesh,libMesh/libmesh,dschwen/libmesh,capitalaslash/libmesh,BalticPinguin/libmesh,jwpeterson/libmesh,capitalaslash/libmesh,dschwen/libmesh,dschwen/libmesh,libMesh/libmesh,libMesh/libmesh,jwpeterson/libmesh,dschwen/libmesh,BalticPinguin/libmesh,roystgnr/libmesh,jwpeterson/libmesh,libMesh/libmesh,BalticPinguin/libmesh,roystgnr/libmesh,capitalaslash/libmesh,capitalaslash/libmesh,roystgnr/libmesh,dschwen/libmesh,libMesh/libmesh,jwpeterson/libmesh,roystgnr/libmesh,dschwen/libmesh,jwpeterson/libmesh,capitalaslash/libmesh,BalticPinguin/libmesh,roystgnr/libmesh,roystgnr/libmesh,roystgnr/libmesh,libMesh/libmesh,capitalaslash/libmesh,libMesh/libmesh,BalticPinguin/libmesh,BalticPinguin/libmesh,libMesh/libmesh,jwpeterson/libmesh,dschwen/libmesh,dschwen/libmesh