#12 mouse compatibility with pdcurses

[Mateusz Viste]

ncurses uses a mouse API that is slightly different from the legacy sys-V curses API, which means it won't work with other curses implementations.

I needed it to work with pdcurses, and pdcurses happen to provide a ncurses-compatible API, but under a different name (nc_getmouse), while their getmouse() is a sys-V compatible one.

Here is a patch that makes the mouse work both with ncurses and pdcurses (and maybe other curses, too, who knows).

[Mateusz Viste]

done