audit: remove redundant initialization of static variables to 0

Static variables are automatically initialized to 0 by the compiler.
Remove the redundant explicit assignments in kernel/audit.c to clean
up the code, align with standard kernel coding style, and fix the
following checkpatch.pl errors:

 ./scripts/checkpatch.pl kernel/audit.c | grep -A2 ERROR:
 ERROR: do not initialise statics to 0
 +	static unsigned long	last_check = 0;
 --
 ERROR: do not initialise statics to 0
 +	static int		messages   = 0;
 --
 ERROR: do not initialise statics to 0
 +	static unsigned long	last_msg = 0;

Signed-off-by: Ricardo Robaina <rrobaina@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

Author: rprobaina

kernel/audit.c

@@ -355,8 +355,8 @@ void audit_panic(const char *message)
 
 static inline int audit_rate_check(void)
 {
-	static unsigned long	last_check = 0;
-	static int		messages   = 0;
+	static unsigned long	last_check;
+	static int		messages;
 	static DEFINE_SPINLOCK(lock);
 	unsigned long		flags;
 	unsigned long		now;
@@ -391,7 +391,7 @@ static inline int audit_rate_check(void)
 */
 void audit_log_lost(const char *message)
 {
-	static unsigned long	last_msg = 0;
+	static unsigned long	last_msg;
 	static DEFINE_SPINLOCK(lock);
 	unsigned long		flags;
 	unsigned long		now;