Changes in xdr_io.C for -Wshadow.
Changes in xdr_io.C for -Wshadow.

Issue #24.

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