Update openat parser for the RVAL_DECODED change

* open.c (sys_openat): Update for RVAL_DECODED.
diff --git a/open.c b/open.c
index 828cd6a..974f50c 100644
--- a/open.c
+++ b/open.c
@@ -103,8 +103,7 @@
 
 SYS_FUNC(openat)
 {
-	if (entering(tcp))
-		print_dirfd(tcp, tcp->u_arg[0]);
+	print_dirfd(tcp, tcp->u_arg[0]);
 	return decode_open(tcp, 1);
 }