[Bug libc/17039] New: malloc_info should use chunksize() for normal bins stats too

["jipan.yang at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=17039

            Bug ID: 17039
           Summary: malloc_info should use chunksize() for normal bins
                    stats too
           Product: glibc
           Version: 2.21
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: jipan.yang at gmail dot com
                CC: drepper.fsp at gmail dot com

Fast bin is using  "size_t thissize = chunksize (p);".  
Using r->size directly gives wrong total and avail size data.

       if (r != NULL)
          while (r != bin)
            {
              ++sizes[NFASTBINS - 1 + i].count;
              sizes[NFASTBINS - 1 + i].total += r->size;
              sizes[NFASTBINS - 1 + i].from
                = MIN (sizes[NFASTBINS - 1 + i].from, r->size);
              sizes[NFASTBINS - 1 + i].to = MAX (sizes[NFASTBINS - 1 + i].to,
                                                 r->size);

              r = r->fd;
            }

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