std::regex: inserting std::wregex to std::vector loses some std::wregex values

[Jonathan Wakely]

On 23/09/14 23:11 -0700, Tim Shen wrote:
>> So I'll change the patch to move _M_traits to _NFA, and add a new
>> basic_regex::_M_loc member.
>
>Here it is :). Bootstrapped and tested with debug flag.

OK for trunk - thanks.