AUDIT: Fix compile error in audit_filter_syscall

We didn't rename it to audit_tgid after all. Except once... Doh.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 517b253..242d45e 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -517,7 +517,7 @@
 	int		   word = AUDIT_WORD(ctx->major);
 	int		   bit  = AUDIT_BIT(ctx->major);
 
-	if (audit_pid && tsk->tgid == audit_tgid)
+	if (audit_pid && tsk->tgid == audit_pid)
 		return AUDIT_DISABLED;
 
 	rcu_read_lock();