Fix unused variable warning.
Fix unused variable warning.

pbauman/libmesh,giorgiobornia/libmesh,jwpeterson/libmesh,libMesh/libmesh,hrittich/libmesh,capitalaslash/libmesh,jwpeterson/libmesh,roystgnr/libmesh,pbauman/libmesh,hrittich/libmesh,BalticPinguin/libmesh,dschwen/libmesh,pbauman/libmesh,90jrong/libmesh,BalticPinguin/libmesh,90jrong/libmesh,giorgiobornia/libmesh,pbauman/libmesh,libMesh/libmesh,BalticPinguin/libmesh,capitalaslash/libmesh,dschwen/libmesh,hrittich/libmesh,giorgiobornia/libmesh,roystgnr/libmesh,pbauman/libmesh,giorgiobornia/libmesh,capitalaslash/libmesh,90jrong/libmesh,jwpeterson/libmesh,jwpeterson/libmesh,pbauman/libmesh,giorgiobornia/libmesh,giorgiobornia/libmesh,90jrong/libmesh,hrittich/libmesh,dschwen/libmesh,dschwen/libmesh,roystgnr/libmesh,90jrong/libmesh,90jrong/libmesh,hrittich/libmesh,90jrong/libmesh,jwpeterson/libmesh,roystgnr/libmesh,roystgnr/libmesh,BalticPinguin/libmesh,capitalaslash/libmesh,jwpeterson/libmesh,hrittich/libmesh,roystgnr/libmesh,libMesh/libmesh,dschwen/libmesh,jwpeterson/libmesh,BalticPinguin/libmesh,pbauman/libmesh,capitalaslash/libmesh,capitalaslash/libmesh,libMesh/libmesh,libMesh/libmesh,libMesh/libmesh,dschwen/libmesh,roystgnr/libmesh,hrittich/libmesh,dschwen/libmesh,jwpeterson/libmesh,hrittich/libmesh,roystgnr/libmesh,libMesh/libmesh,pbauman/libmesh,capitalaslash/libmesh,giorgiobornia/libmesh,hrittich/libmesh,BalticPinguin/libmesh,pbauman/libmesh,giorgiobornia/libmesh,dschwen/libmesh,capitalaslash/libmesh,libMesh/libmesh,90jrong/libmesh,90jrong/libmesh,BalticPinguin/libmesh,giorgiobornia/libmesh,BalticPinguin/libmesh