* src/rtl/listbox.prg
! fix listbox scroll bar position calculation to not rely on
default Cl*pper compatible division by zero error handler.
Thanks to tarpauwatratar for the report and fix suggestion
on the developers list.
* contrib/hbdoc/hbdoc.prg
* contrib/hbformat/utils/hbformat.prg
* contrib/hbnetio/utils/hbnetio/hbnetio.prg
* package/harbour.mft
* package/harbour.rc
* src/compiler/hbusage.c
* utils/hbi18n/hbi18n.prg
* utils/hbtest/hbtest.prg
* bumped copyright year to 2020
* ChangeLog.txt
* function name typo + file case corrected
b337909ce6