Don't call dof_number() if there is no DOF to get.
Don't call dof_number() if there is no DOF to get.

permcody/libmesh,karpeev/libmesh,coreymbryant/libmesh,jwpeterson/libmesh,vikramvgarg/libmesh,coreymbryant/libmesh,permcody/libmesh,jiangwen84/libmesh,friedmud/libmesh,BalticPinguin/libmesh,permcody/libmesh,capitalaslash/libmesh,hrittich/libmesh,hrittich/libmesh,capitalaslash/libmesh,aeslaughter/libmesh,BalticPinguin/libmesh,friedmud/libmesh,svallaghe/libmesh,90jrong/libmesh,giorgiobornia/libmesh,karpeev/libmesh,svallaghe/libmesh,aeslaughter/libmesh,karpeev/libmesh,dknez/libmesh,cahaynes/libmesh,giorgiobornia/libmesh,cahaynes/libmesh,capitalaslash/libmesh,pbauman/libmesh,svallaghe/libmesh,svallaghe/libmesh,giorgiobornia/libmesh,BalticPinguin/libmesh,karpeev/libmesh,balborian/libmesh,roystgnr/libmesh,friedmud/libmesh,coreymbryant/libmesh,BalticPinguin/libmesh,dschwen/libmesh,hrittich/libmesh,aeslaughter/libmesh,90jrong/libmesh,dschwen/libmesh,jiangwen84/libmesh,svallaghe/libmesh,BalticPinguin/libmesh,90jrong/libmesh,permcody/libmesh,permcody/libmesh,libMesh/libmesh,libMesh/libmesh,balborian/libmesh,dmcdougall/libmesh,90jrong/libmesh,giorgiobornia/libmesh,dschwen/libmesh,jiangwen84/libmesh,libMesh/libmesh,jwpeterson/libmesh,coreymbryant/libmesh,90jrong/libmesh,BalticPinguin/libmesh,karpeev/libmesh,hrittich/libmesh,giorgiobornia/libmesh,hrittich/libmesh,cahaynes/libmesh,libMesh/libmesh,dknez/libmesh,dmcdougall/libmesh,aeslaughter/libmesh,aeslaughter/libmesh,balborian/libmesh,coreymbryant/libmesh,giorgiobornia/libmesh,dknez/libmesh,svallaghe/libmesh,svallaghe/libmesh,permcody/libmesh,benkirk/libmesh,friedmud/libmesh,dmcdougall/libmesh,dschwen/libmesh,jiangwen84/libmesh,vikramvgarg/libmesh,dmcdougall/libmesh,dmcdougall/libmesh,benkirk/libmesh,aeslaughter/libmesh,libMesh/libmesh,svallaghe/libmesh,capitalaslash/libmesh,benkirk/libmesh,jwpeterson/libmesh,jiangwen84/libmesh,dknez/libmesh,cahaynes/libmesh,capitalaslash/libmesh,dknez/libmesh,benkirk/libmesh,aeslaughter/libmesh,cahaynes/libmesh,karpeev/libmesh,dmcdougall/libmesh,dknez/libmesh,pbauman/libmesh,pbauman/libmesh,vikramvgarg/libmesh,cahaynes/libmesh,vikramvgarg/libmesh,vikramvgarg/libmesh,roystgnr/libmesh,dschwen/libmesh,dschwen/libmesh,vikramvgarg/libmesh,dschwen/libmesh,giorgiobornia/libmesh,karpeev/libmesh,jiangwen84/libmesh,90jrong/libmesh,benkirk/libmesh,vikramvgarg/libmesh,roystgnr/libmesh,vikramvgarg/libmesh,benkirk/libmesh,aeslaughter/libmesh,aeslaughter/libmesh,hrittich/libmesh,permcody/libmesh,friedmud/libmesh,pbauman/libmesh,roystgnr/libmesh,pbauman/libmesh,libMesh/libmesh,svallaghe/libmesh,libMesh/libmesh,jiangwen84/libmesh,balborian/libmesh,coreymbryant/libmesh,jwpeterson/libmesh,hrittich/libmesh,jwpeterson/libmesh,dmcdougall/libmesh,pbauman/libmesh,hrittich/libmesh,coreymbryant/libmesh,friedmud/libmesh,balborian/libmesh,friedmud/libmesh,roystgnr/libmesh,pbauman/libmesh,balborian/libmesh,dknez/libmesh,cahaynes/libmesh,capitalaslash/libmesh,roystgnr/libmesh,giorgiobornia/libmesh,90jrong/libmesh,coreymbryant/libmesh,roystgnr/libmesh,90jrong/libmesh,permcody/libmesh,BalticPinguin/libmesh,hrittich/libmesh,friedmud/libmesh,balborian/libmesh,libMesh/libmesh,karpeev/libmesh,jwpeterson/libmesh,balborian/libmesh,benkirk/libmesh,jiangwen84/libmesh,pbauman/libmesh,giorgiobornia/libmesh,capitalaslash/libmesh,dknez/libmesh,dschwen/libmesh,90jrong/libmesh,balborian/libmesh,capitalaslash/libmesh,pbauman/libmesh,jwpeterson/libmesh,balborian/libmesh,benkirk/libmesh,roystgnr/libmesh,friedmud/libmesh,jwpeterson/libmesh,BalticPinguin/libmesh,vikramvgarg/libmesh,benkirk/libmesh,cahaynes/libmesh,dmcdougall/libmesh