#255 Gun Stick support for Opera Soft games

[reg2s]

This patch adds Gun Stick support for Trigger, Solo and Guillermo Tell games from Opera Soft which don't support any other input devices. Gun Stick in Cosmic Sheriff from Dinamic also can be turned on (this game originally supports only keyboard and joystick):

SS01

00003133: 00 01
0000A65E: 00 01

Patch is very simple and has some drawbacks: it breaks covox support and graphical cursor can be seen in text mode. So don't use it for other games.

Patch was made in technical berau of Old-Games.RU project (www.old-games.ru).

[reg2s]