K 10 svn:author V 5 orion K 8 svn:date V 27 2002-08-28T15:19:30.000000Z K 7 svn:log V 221 Marginally simplify dsp_open error handling by adding an early test to determine liklihood of opening device in requested directions. Makes for simpler error handling and change should close kern/35004. PR: kern/35004. END