[Dune] Error when compiling dune-grid with Intel's icpc 11.1

[Christian Engwer]

Hi Leonard,

> zero (0) errors! However, there're still a few warnings of which I
> don't know whether they're icpc-related or minor issues in the code.
> FYI there is a full output of the build attached (using revisions
> 5571 and 5359, respectively).

tank you for reporting these warnings. I believe they should be fixed
in my recent commit. Still I can't say for sure are I don't have an
ICC at hand and my gcc doesn't complain.

Cheers
Christian