New sound code will allow to use the 8bit DMA for the 16bit
sound when the 16bit DMA is broken/unavail. That's the official
feature of SB16, lets make blaster.c aware of it.


git-svn-id: https://dosemu.svn.sourceforge.net/svnroot/dosemu/trunk@1318 7758b857-130e-0410-ab9c-d8735a528d18