Don't use deprecated Elem::neighbor()
Don't use deprecated Elem::neighbor()

I really need to start habitually building with deprecated support
turned off, now that that's a thing.

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