Add header to get inline Comm::max(int)
Add header to get inline Comm::max(int)

Otherwise the linker gets confused when it can't find an
instantiation.

capitalaslash/libmesh,roystgnr/libmesh,roystgnr/libmesh,libMesh/libmesh,pbauman/libmesh,90jrong/libmesh,jwpeterson/libmesh,hrittich/libmesh,capitalaslash/libmesh,hrittich/libmesh,90jrong/libmesh,pbauman/libmesh,dschwen/libmesh,pbauman/libmesh,pbauman/libmesh,dschwen/libmesh,jwpeterson/libmesh,roystgnr/libmesh,90jrong/libmesh,libMesh/libmesh,jwpeterson/libmesh,jwpeterson/libmesh,capitalaslash/libmesh,capitalaslash/libmesh,90jrong/libmesh,hrittich/libmesh,BalticPinguin/libmesh,roystgnr/libmesh,dschwen/libmesh,jwpeterson/libmesh,capitalaslash/libmesh,hrittich/libmesh,dschwen/libmesh,hrittich/libmesh,dschwen/libmesh,capitalaslash/libmesh,libMesh/libmesh,dschwen/libmesh,roystgnr/libmesh,jwpeterson/libmesh,libMesh/libmesh,libMesh/libmesh,BalticPinguin/libmesh,pbauman/libmesh,libMesh/libmesh,jwpeterson/libmesh,hrittich/libmesh,90jrong/libmesh,dschwen/libmesh,hrittich/libmesh,BalticPinguin/libmesh,pbauman/libmesh,dschwen/libmesh,capitalaslash/libmesh,pbauman/libmesh,BalticPinguin/libmesh,BalticPinguin/libmesh,hrittich/libmesh,pbauman/libmesh,90jrong/libmesh,90jrong/libmesh,roystgnr/libmesh,capitalaslash/libmesh,BalticPinguin/libmesh,roystgnr/libmesh,90jrong/libmesh,roystgnr/libmesh,BalticPinguin/libmesh,90jrong/libmesh,jwpeterson/libmesh,libMesh/libmesh,hrittich/libmesh,BalticPinguin/libmesh,libMesh/libmesh,pbauman/libmesh