Use void_fe_switch for FEInterface functions returning void.
Use void_fe_switch for FEInterface functions returning void.

It may not actually be necessary to have both the fe_switch and
void_fe_switch macros... at least my compiler didn't complain about
code like

void g();
void f()
{
  return g();
}

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