Do not reference invalid dbfr_t in pivot's output phase.
Do not reference invalid dbfr_t in pivot's output phase.

src/pivot/pivot.c (pivot): instead of sizing pivot_label based on
  in_reader->current_line_sz, track the largest such value before closing
  each input file, and use that result for buffer allocation.


git-svn-id: 036a1c5f902f528d79fbac72fb947c91fe594755@408 9f305d85-0c50-0410-b3e0-65f4174694de

johan/crush-tools,johan/crush-tools,johan/crush-tools