guard the new add_vector implementation properly
guard the new add_vector implementation properly

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