Changes in petscdmlibmesh.C for -Wshadow.
Changes in petscdmlibmesh.C for -Wshadow.

Issue #24.

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