Hack to keep ScummVM from using CD-ROM
This may be too ugly to apply, but...
I noticed that at least with the SDL backend, if you tell ScummVM to use CD-ROM < 0 it won't lock the CD tray because the CD initialisation fails. Since I almost always use the MP3 versions of the audio tracks I find this convenient. Especially if I want to use the CD-ROM for something else.
This patch simply makes it a deliberate behaviour. It also removes an unnecessary variable from
(It could be argued that we should never use PROP_OPEN_CD unless the game has the GF_AUDIOTRACKS flag. For some reason that just didn't occur to me until now.)
Ticket imported from: #615842. Ticket imported from: patches/173.