Return invalid field if asked for a TOC and disc is a blank disc in CD drives.

src/scsi/scsi_cdrom.c

@@ -2642,6 +2642,12 @@ scsi_cdrom_command(scsi_common_t *sc, const uint8_t *cdb)
             if (dev->drv->ops == NULL)
                 scsi_cdrom_not_ready(dev);
             else if (toc_format < 3) {
+                // Blank discs return invalid field when asked for a TOC
+                if (dev->drv->cd_status & CD_STATUS_BLANK_MASK) {
+                        scsi_cdrom_invalid_field(dev, toc_format);
+                        break;
+                }
+
                 len = cdrom_read_toc(dev->drv, dev->buffer, toc_format, cdb[6], msf, max_len);
                 /* If the returned length is -1, this means cdrom_read_toc() has encountered an error. */
                 if (len == -1)