Changes in node.C for -Wshadow.
Changes in node.C for -Wshadow.

Issue #24.

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