Fix two compile errors in new endgame code

Fix two compile errors in new endgame code

Code that compiles cleanly under MSVC triggers one
compile error (correct) under Intel C++ and two(!)
under gcc.

The first is the same complained by Intel, but the second
is an interesting corner case of C++ standard (there are many)
that is correctly spotted only by gcc.

Both MSVC and Intel pass this silently, probably to avoid
breaking people code.

Now we are fully C++ compliant ;-)

Signed-off-by: Marco Costalba <mcostalba@gmail.com>