[mythtv] mythgame docs: xmame setup

[Robert Kulagowski]

hary wilke wrote:
> Hints:
> No joystick causing failure to launch solution:
> i don't have a joystick and mythgame expects a joystick by default.  
> xmame will fail to launch because mythgame sends the option "-joytype  
> 4" to xmame by default. To fix this you need to do a little bit of  
> voodoo on your mythconverge database. You will need to set "joytype"  to 
> 0 by editing the mamesettings table in your mythconverge database.  I 
> used phpMyAdmin cause i'm a SQL newb!

I'm almost ready to commit a version of these instructions, but need to 
know if this caveat still holds true, and if the solution is to modify 
the mamesettings table.