[Groff] Bug in -ms multi-column output with different odd/even page

[Egil Kvaleberg]

I must admit fail to see the reasoning behind using a separate "save"
register for keeping the "global" page offset instead of using PO
directly. 

With alternate PO's set for odd/even pages, using multi-column
multi-page output, the net effect is that the > 1st column is not
positioned correctly.

Perhaps it would be an idea to add an improved odd/even support in -ms.
It is just a matter of a couple of extra lines.

Patch follows:
------------------------------------------------------------------------

*** s.tmac.orig Tue Nov 12 05:50:30 2002
--- s.tmac      Tue Nov 12 05:51:27 2002
***************
*** 499,503 ****
  .nr pg*col-num 0
  .nr address@hidden 0
- .nr pg*saved-po \\n[PO]
  .po \\n[PO]u
  .ev h
--- 499,502 ----
***************
*** 536,545 ****
  .de pg*end-col
  'sp |\\n[pg*col-top]u
! .po (u;\\n[pg*saved-po]+(address@hidden))
  .\"po +(u;address@hidden)
  .pg*start-col
  ..
  .de pg*end-page
! .po \\n[pg*saved-po]u
  .\" Make sure we don't exit if there are still floats or footnotes
left-over.
  .ie address@hidden<address@hidden:address@hidden \{\
--- 535,544 ----
  .de pg*end-col
  'sp |\\n[pg*col-top]u
! .po (u;\\n[PO]+(address@hidden))
  .\"po +(u;address@hidden)
  .pg*start-col
  ..
  .de pg*end-page
! .po \\n[PO]u
  .\" Make sure we don't exit if there are still floats or footnotes
left-over.
  .ie address@hidden<address@hidden:address@hidden \{\

--------------------------------------------------------------------------

Egil
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