[ALSA] Remove zero-initialization of static variables

Removed zero-initializations of static variables.
A tiny optimization.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/core/sound_oss.c b/sound/core/sound_oss.c
index 0043c9a..74f0fe5 100644
--- a/sound/core/sound_oss.c
+++ b/sound/core/sound_oss.c
@@ -209,7 +209,7 @@
 
 #ifdef CONFIG_PROC_FS
 
-static struct snd_info_entry *snd_minor_info_oss_entry = NULL;
+static struct snd_info_entry *snd_minor_info_oss_entry;
 
 static const char *snd_oss_device_type_name(int type)
 {