loci: fix 32-bit build

GCC warned "this decimal constant is unsigned only in ISO C90" for large 32-bit
constants. Fixed by writing them in hex.
diff --git a/test_data/of10/packet_out.data b/test_data/of10/packet_out.data
index fdd1c3d..a3c642b 100644
--- a/test_data/of10/packet_out.data
+++ b/test_data/of10/packet_out.data
@@ -25,7 +25,7 @@
     data='abc')
 -- c
 obj = of_packet_out_new(OF_VERSION_1_0);
-of_packet_out_buffer_id_set(obj, 2882400001);
+of_packet_out_buffer_id_set(obj, 0xabcdef01);
 of_packet_out_in_port_set(obj, 65534);
 of_packet_out_xid_set(obj, 305419896);
 {