[Bug libstdc++/12750] New: time_get::_M_extract_via_format doesn't deal with 'e'

["paolo at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12750

           Summary: time_get::_M_extract_via_format doesn't deal with 'e'
           Product: gcc
           Version: 3.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libstdc++
        AssignedTo: paolo at gcc dot gnu dot org
        ReportedBy: paolo at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org
  GCC host triplet: Any

Consider, f.i., "is_IS": its strftime format is '%a %e.%b %Y'.

However, _M_extract_via_format doesn't have a case for 'e', and, moreover, it's
not trivial to add one, since in the single digit case we have to skip the
initial space, but _M_extract_num cannot currently do that.