[Bug libstdc++/59872] [4.9 Regression] Cannot move std::map with move-only mapped_type

[potswa at mac dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59872

--- Comment #7 from David Krauss <potswa at mac dot com> ---
That's a better factoring. I was just avoiding creating a new, named function.
Thanks!