CVS commit: src/share/man/man9

["Tetsuya Isaki" <isaki%netbsd.org@localhost>]

Module Name:    src
Committed By:   isaki
Date:           Sat Feb 16 06:51:05 UTC 2019

Modified Files:
        src/share/man/man9: audio.9

Log Message:
Two minor fixes.
- 0 -> NULL.
- avoid K&R and sync with reality.


To generate a diff of this commit:
cvs rdiff -u -r1.49 -r1.50 src/share/man/man9/audio.9

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.