ALSA: Replace 0 with NULL in writing-an-alsa-driver.tmpl
Spotted while correcting the sentences.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/Documentation/DocBook/writing-an-alsa-driver.tmpl b/Documentation/DocBook/writing-an-alsa-driver.tmpl
index c564faa..bd6fee2 100644
--- a/Documentation/DocBook/writing-an-alsa-driver.tmpl
+++ b/Documentation/DocBook/writing-an-alsa-driver.tmpl
@@ -3278,8 +3278,8 @@
<programlisting>
<![CDATA[
snd_pcm_hw_rule_add(substream->runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
- hw_rule_channels_by_format, 0, SNDRV_PCM_HW_PARAM_FORMAT,
- -1);
+ hw_rule_channels_by_format, NULL,
+ SNDRV_PCM_HW_PARAM_FORMAT, -1);
]]>
</programlisting>
</informalexample>
@@ -3321,8 +3321,8 @@
<programlisting>
<![CDATA[
snd_pcm_hw_rule_add(substream->runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
- hw_rule_format_by_channels, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
- -1);
+ hw_rule_format_by_channels, NULL,
+ SNDRV_PCM_HW_PARAM_CHANNELS, -1);
]]>
</programlisting>
</informalexample>