That block of code at the top of the file started out as

  #include "precompiled_svl.hxx"

  #ifdef WNT
  # include <prewin.h>
  # include <postwin.h>
  # undef ERROR
  #endif

in d2a16264 "Initial unit test skeleton, copied
and modified from sc", so assume the leftover #undef is unnecessary cargo-cult
by now.

Change-Id: I39637518d1507352b1eb2ed19168013d9fe635ac
Reviewed-on: https://gerrit.libreoffice.org/54499Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
Tested-by: Stephan Bergmann <sbergman@redhat.com>