fix weird NULL comparison
fix weird NULL comparison

benkirk/libmesh,cahaynes/libmesh,markcmiller86/libmesh_silo,pbauman/libmesh,jiangwen84/libmesh,salazardetroya/libmesh,markcmiller86/libmesh_silo,dschwen/libmesh,dmcdougall/libmesh,salazardetroya/libmesh,aeslaughter/libmesh,benkirk/libmesh,capitalaslash/libmesh,BalticPinguin/libmesh,salazardetroya/libmesh,hrittich/libmesh,dknez/libmesh,BalticPinguin/libmesh,coreymbryant/libmesh,karpeev/libmesh,aeslaughter/libmesh,dknez/libmesh,karpeev/libmesh,dmcdougall/libmesh,jiangwen84/libmesh,karpeev/libmesh,BalticPinguin/libmesh,salazardetroya/libmesh,balborian/libmesh,permcody/libmesh,libMesh/libmesh,cahaynes/libmesh,cahaynes/libmesh,friedmud/libmesh,benkirk/libmesh,giorgiobornia/libmesh,jwpeterson/libmesh,Mbewu/libmesh,dschwen/libmesh,markcmiller86/libmesh_silo,coreymbryant/libmesh,friedmud/libmesh,permcody/libmesh,90jrong/libmesh,roystgnr/libmesh,dmcdougall/libmesh,cahaynes/libmesh,jiangwen84/libmesh,aeslaughter/libmesh,dknez/libmesh,BalticPinguin/libmesh,pbauman/libmesh,hrittich/libmesh,capitalaslash/libmesh,cahaynes/libmesh,friedmud/libmesh,dschwen/libmesh,vikramvgarg/libmesh,pbauman/libmesh,coreymbryant/libmesh,roystgnr/libmesh,aeslaughter/libmesh,roystgnr/libmesh,cahaynes/libmesh,jwpeterson/libmesh,salazardetroya/libmesh,svallaghe/libmesh,permcody/libmesh,dknez/libmesh,jwpeterson/libmesh,salazardetroya/libmesh,svallaghe/libmesh,benkirk/libmesh,libMesh/libmesh,dschwen/libmesh,libMesh/libmesh,svallaghe/libmesh,90jrong/libmesh,permcody/libmesh,90jrong/libmesh,karpeev/libmesh,jiangwen84/libmesh,capitalaslash/libmesh,libMesh/libmesh,jwpeterson/libmesh,vikramvgarg/libmesh,markcmiller86/libmesh_silo,giorgiobornia/libmesh,aeslaughter/libmesh,jwpeterson/libmesh,capitalaslash/libmesh,jiangwen84/libmesh,roystgnr/libmesh,aeslaughter/libmesh,giorgiobornia/libmesh,svallaghe/libmesh,libMesh/libmesh,benkirk/libmesh,hrittich/libmesh,dmcdougall/libmesh,vikramvgarg/libmesh,markcmiller86/libmesh_silo,roystgnr/libmesh,vikramvgarg/libmesh,benkirk/libmesh,hrittich/libmesh,hrittich/libmesh,dknez/libmesh,balborian/libmesh,roystgnr/libmesh,90jrong/libmesh,Mbewu/libmesh,giorgiobornia/libmesh,dknez/libmesh,coreymbryant/libmesh,BalticPinguin/libmesh,libMesh/libmesh,libMesh/libmesh,dschwen/libmesh,salazardetroya/libmesh,karpeev/libmesh,giorgiobornia/libmesh,markcmiller86/libmesh_silo,permcody/libmesh,dknez/libmesh,friedmud/libmesh,90jrong/libmesh,friedmud/libmesh,dschwen/libmesh,pbauman/libmesh,capitalaslash/libmesh,dschwen/libmesh,aeslaughter/libmesh,permcody/libmesh,BalticPinguin/libmesh,90jrong/libmesh,balborian/libmesh,svallaghe/libmesh,salazardetroya/libmesh,balborian/libmesh,dmcdougall/libmesh,capitalaslash/libmesh,karpeev/libmesh,balborian/libmesh,90jrong/libmesh,jwpeterson/libmesh,roystgnr/libmesh,Mbewu/libmesh,cahaynes/libmesh,svallaghe/libmesh,jiangwen84/libmesh,balborian/libmesh,vikramvgarg/libmesh,friedmud/libmesh,permcody/libmesh,capitalaslash/libmesh,coreymbryant/libmesh,Mbewu/libmesh,karpeev/libmesh,balborian/libmesh,giorgiobornia/libmesh,benkirk/libmesh,friedmud/libmesh,friedmud/libmesh,dmcdougall/libmesh,hrittich/libmesh,Mbewu/libmesh,giorgiobornia/libmesh,libMesh/libmesh,svallaghe/libmesh,svallaghe/libmesh,coreymbryant/libmesh,aeslaughter/libmesh,hrittich/libmesh,pbauman/libmesh,coreymbryant/libmesh,dmcdougall/libmesh,coreymbryant/libmesh,jwpeterson/libmesh,balborian/libmesh,vikramvgarg/libmesh,pbauman/libmesh,90jrong/libmesh,giorgiobornia/libmesh,dschwen/libmesh,jiangwen84/libmesh,Mbewu/libmesh,balborian/libmesh,pbauman/libmesh,cahaynes/libmesh,permcody/libmesh,Mbewu/libmesh,roystgnr/libmesh,pbauman/libmesh,balborian/libmesh,karpeev/libmesh,pbauman/libmesh,vikramvgarg/libmesh,dmcdougall/libmesh,90jrong/libmesh,jiangwen84/libmesh,capitalaslash/libmesh,BalticPinguin/libmesh,vikramvgarg/libmesh,markcmiller86/libmesh_silo,markcmiller86/libmesh_silo,Mbewu/libmesh,svallaghe/libmesh,hrittich/libmesh,hrittich/libmesh,aeslaughter/libmesh,benkirk/libmesh,friedmud/libmesh,giorgiobornia/libmesh,jwpeterson/libmesh,Mbewu/libmesh,benkirk/libmesh,vikramvgarg/libmesh,dknez/libmesh,BalticPinguin/libmesh