Avoid some implicit conversions
Avoid some implicit conversions

This fixes a few gcc-3.4 warnings, but seems like good practice
regardless.

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