2013-04-11 18:40 UTC+0200 Viktor Szakats (harbour syenar.net)
  * contrib/hbhpdf/errstr.prg
    + added new error code HB_HPDF_BADPARAM
    + added constant for existing error code -1, now named HB_HPDF_NOTSUPPORTED

  * contrib/hbhpdf/annot.c
  * contrib/hbhpdf/core.c
  * contrib/hbhpdf/harupdf.ch
  * contrib/hbhpdf/hbhpdf.h
  * contrib/hbhpdf/image.c
  * contrib/hbhpdf/pdfa.c
    ! fixed GPFs when wrong parameter is passed

  + contrib/hbhpdf/tests/stress.prg
    + added stress test that calls every HPDF API with no parameter

  * contrib/hbhpdf/misc.prg
    * formatting