tests: Fix sparse error on test-ovn.c
Commit fixed the MSVC issue
however, introduced a sparse error:
"tests/test-ovn.c:205:43: warning: Using plain integer as NULL pointer"
Use 'NULL' instead of '0'.
Acked-by: Shashank Ram
@@ -202,7 +202,7 @@ create_addr_sets(struct shash *addr_sets)
static const char *const addrs3[] = {
"00:00:00:00:00:01", "00:00:00:00:00:02", "00:00:00:00:00:03",
};
- static const char *const addrs4[] = { 0 };
+ static const char *const addrs4[] = { NULL };
expr_addr_sets_add(addr_sets, "set1", addrs1, 3);
expr_addr_sets_add(addr_sets, "set2", addrs2, 3);
