only set the old_dof_object if the current system has DOFs.  prevents the case of multiple systems being initialized successively - in the old implementation the first system would initialize and not set the old_dof_object.  then the second system would initialize and set the old_dof_object because the first system had added DOFs.  this fixes that erroneous behavior.
only set the old_dof_object if the current system has DOFs.  prevents the case of multiple systems being initialized successively - in the old implementation the first system would initialize and not set the old_dof_object.  then the second system would initialize and set the old_dof_object because the first system had added DOFs.  this fixes that erroneous behavior.




git-svn-id: e88a1e38e13faf406e05cc89eca8dd613216f6c4@4474 434f946d-2f3d-0410-ba4c-cb9f52fb0dbf

roystgnr/libmesh,coreymbryant/libmesh,hrittich/libmesh,jwpeterson/libmesh,svallaghe/libmesh,dknez/libmesh,cahaynes/libmesh,vikramvgarg/libmesh,hrittich/libmesh,friedmud/libmesh,benkirk/libmesh,cahaynes/libmesh,BalticPinguin/libmesh,dknez/libmesh,capitalaslash/libmesh,pbauman/libmesh,pbauman/libmesh,90jrong/libmesh,pbauman/libmesh,aeslaughter/libmesh,dschwen/libmesh,90jrong/libmesh,giorgiobornia/libmesh,balborian/libmesh,balborian/libmesh,dschwen/libmesh,vikramvgarg/libmesh,jwpeterson/libmesh,aeslaughter/libmesh,vikramvgarg/libmesh,svallaghe/libmesh,BalticPinguin/libmesh,dmcdougall/libmesh,friedmud/libmesh,benkirk/libmesh,pbauman/libmesh,aeslaughter/libmesh,benkirk/libmesh,90jrong/libmesh,aeslaughter/libmesh,jwpeterson/libmesh,friedmud/libmesh,roystgnr/libmesh,balborian/libmesh,benkirk/libmesh,dschwen/libmesh,90jrong/libmesh,libMesh/libmesh,jwpeterson/libmesh,cahaynes/libmesh,vikramvgarg/libmesh,hrittich/libmesh,giorgiobornia/libmesh,coreymbryant/libmesh,vikramvgarg/libmesh,BalticPinguin/libmesh,BalticPinguin/libmesh,jwpeterson/libmesh,cahaynes/libmesh,90jrong/libmesh,libMesh/libmesh,hrittich/libmesh,dmcdougall/libmesh,aeslaughter/libmesh,capitalaslash/libmesh,friedmud/libmesh,pbauman/libmesh,dknez/libmesh,dschwen/libmesh,giorgiobornia/libmesh,friedmud/libmesh,balborian/libmesh,svallaghe/libmesh,capitalaslash/libmesh,coreymbryant/libmesh,dknez/libmesh,giorgiobornia/libmesh,hrittich/libmesh,balborian/libmesh,giorgiobornia/libmesh,capitalaslash/libmesh,balborian/libmesh,coreymbryant/libmesh,roystgnr/libmesh,cahaynes/libmesh,benkirk/libmesh,dmcdougall/libmesh,svallaghe/libmesh,jwpeterson/libmesh,hrittich/libmesh,dmcdougall/libmesh,pbauman/libmesh,dmcdougall/libmesh,giorgiobornia/libmesh,capitalaslash/libmesh,capitalaslash/libmesh,cahaynes/libmesh,libMesh/libmesh,svallaghe/libmesh,roystgnr/libmesh,libMesh/libmesh,friedmud/libmesh,90jrong/libmesh,benkirk/libmesh,coreymbryant/libmesh,balborian/libmesh,coreymbryant/libmesh,roystgnr/libmesh,BalticPinguin/libmesh,hrittich/libmesh,aeslaughter/libmesh,dknez/libmesh,roystgnr/libmesh,svallaghe/libmesh,libMesh/libmesh,balborian/libmesh,svallaghe/libmesh,BalticPinguin/libmesh,balborian/libmesh,cahaynes/libmesh,libMesh/libmesh,giorgiobornia/libmesh,vikramvgarg/libmesh,roystgnr/libmesh,hrittich/libmesh,dknez/libmesh,dschwen/libmesh,aeslaughter/libmesh,90jrong/libmesh,coreymbryant/libmesh,cahaynes/libmesh,friedmud/libmesh,aeslaughter/libmesh,svallaghe/libmesh,pbauman/libmesh,friedmud/libmesh,benkirk/libmesh,BalticPinguin/libmesh,balborian/libmesh,dmcdougall/libmesh,dschwen/libmesh,svallaghe/libmesh,dschwen/libmesh,friedmud/libmesh,benkirk/libmesh,vikramvgarg/libmesh,capitalaslash/libmesh,aeslaughter/libmesh,benkirk/libmesh,giorgiobornia/libmesh,vikramvgarg/libmesh,pbauman/libmesh,jwpeterson/libmesh,vikramvgarg/libmesh,dmcdougall/libmesh,capitalaslash/libmesh,giorgiobornia/libmesh,dknez/libmesh,dknez/libmesh,coreymbryant/libmesh,dschwen/libmesh,roystgnr/libmesh,hrittich/libmesh,dmcdougall/libmesh,libMesh/libmesh,BalticPinguin/libmesh,90jrong/libmesh,pbauman/libmesh,90jrong/libmesh,libMesh/libmesh,jwpeterson/libmesh