Alexander Leidinger c8c4c87d6a Fix some potential NULL pointer dereferences.
This is supposed to fix some Coverity Prevent errors (Ariff didn't
looked at the CID's (ENOTIME), I just told him that there are some problems
in function dsp_ioctl()).

CID:		215-218
Found with:	Coverity Prevent(tm)
Submitted by:	ariff
MFC after:	5 days
2006-01-29 16:48:41 +00:00
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