[Patch, libstdc++/64441] Fix sub_match::first and second

[Jonathan Wakely]

On 2 January 2015 at 01:29, Tim Shen wrote:
> Oh, errr... I'm not sure if it needs a review by probably Jonathan?

I think it qualifies as obvious and so doesn't need approval, but
please wait for me to rotate the ChangeLog file, so we start a new
file for 2015. I'm going to do that in the next hour (or sooner, if I
can get a good network connection).