GTWVG - Correção bug posicionamento

[Itamar M. Lins Jr.]

2015-02-19 01:19 UTC-0800 Pritpal Bedi (bedipritpal/at/hotmail.com)
* contrib/gtwvg/gtwvgd.c
* contrib/gtwvg/gtwgud.c
! Fixed: a bug which was causing HB_GTI_SETPOS_XY/ROWCOL returning
wrong values in case it is called as GET method.

Saudações,
Itamar M. Lins Jr.