[libdmapsharing/LIBDMAPSHARING_3_0] Avoid ck_assert_ptr_null(); CI hosts have old version of check

[W. Michael Petullo <wmpetullo src gnome org>]

commit 9357d22bb6ea0a9833ff3990ce42cc0a9d374533
Author: W. Michael Petullo <mike flyn org>
Date:   Tue Jun 30 20:16:13 2020 -0500

    Avoid ck_assert_ptr_null(); CI hosts have old version of check

 libdmapsharing/dmap-utils.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/libdmapsharing/dmap-utils.c b/libdmapsharing/dmap-utils.c
index 35fca9a..2400058 100644
--- a/libdmapsharing/dmap-utils.c
+++ b/libdmapsharing/dmap-utils.c
@@ -71,13 +71,13 @@ END_TEST
 
 START_TEST(dmap_utils_mime_to_format_test_null)
 {
-       ck_assert_ptr_null(dmap_utils_mime_to_format(NULL));
+       ck_assert_ptr_eq(dmap_utils_mime_to_format(NULL), NULL);
 }
 END_TEST
 
 START_TEST(dmap_utils_mime_to_format_test_bad)
 {
-       ck_assert_ptr_null(dmap_utils_mime_to_format("bad/mime"));
+       ck_assert_ptr_eq(dmap_utils_mime_to_format("bad/mime"), NULL);
 }
 END_TEST