[Bug libstdc++/61166] overflow when parse number in std::duration operator""

[3dw4rd at verizon dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61166

--- Comment #5 from Ed Smith-Rowland <3dw4rd at verizon dot net> ---
Created attachment 32792
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=32792&action=edit
Better patch with test case.

2014-05-13  Ed Smith-Rowland  <3dw...@verizon.net>

        PR libstdc++/61166
        * include/bits/parse_number.h: Replace 'unsigned'
        with 'unsigned long long'.
        * testsuite/20_util/duration/literals/pr61166.cc: New.

I'll send this to gcc-patches when my testing is complete