Fix warning generated while trying to ignore warnings.
Fix warning generated while trying to ignore warnings.

Older versions of clang (at least 3.5, not sure about 3.6) actually
print a warning while we're trying to ignore warnings about unused
typedefs:

unknown warning group '-Wunused-local-typedef', ignored [-Wunknown-pragmas]

Luckily, it looks like this warning can be ignored as well.

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