audit: use memset instead of trying to initialize field by field

We currently are setting fields to 0 to initialize the structure
declared on the stack.  This is a bad idea as if the structure has holes
or unpacked space these will not be initialized.  Just use memset.  This
is not a performance critical section of code.

Signed-off-by: Eric Paris <eparis@redhat.com>
diff --git a/kernel/audit.c b/kernel/audit.c
index e0f7767..3ce60e0 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -759,7 +759,7 @@
 
 	switch (msg_type) {
 	case AUDIT_GET:
-		status_set.mask		 = 0;
+		memset(&status_set, 0, sizeof(status_set));
 		status_set.enabled	 = audit_enabled;
 		status_set.failure	 = audit_failure;
 		status_set.pid		 = audit_pid;