fuzz-bus-message: use ASSERT_OK() and friends

Replace assert_se() with the typed ASSERT_* macros, so that a failing
assertion logs the values involved.

src/libsystemd/sd-bus/fuzz-bus-message.c

@@ -7,6 +7,7 @@
 #include "env-util.h"
 #include "fuzz.h"
 #include "memstream-util.h"
+#include "tests.h"
 
 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
         _cleanup_(memstream_done) MemStream ms = {};
@@ -19,18 +20,18 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
         fuzz_setup_logging();
 
         r = sd_bus_new(&bus);
-        assert_se(r >= 0);
+        ASSERT_OK(r);
 
-        assert_se(buffer = memdup(data, size));
+        buffer = ASSERT_NOT_NULL(memdup(data, size));
 
         r = bus_message_from_malloc(bus, buffer, size, /* fds= */ NULL, /* n_fds= */ 0, /* got_ctrunc= */ false, /* label= */ NULL, &m);
         if (r == -EBADMSG)
                 return 0;
-        assert_se(r >= 0);
+        ASSERT_OK(r);
         TAKE_PTR(buffer);
 
         if (getenv_bool("SYSTEMD_FUZZ_OUTPUT") <= 0)
-                assert_se(g = memstream_init(&ms));
+                g = ASSERT_NOT_NULL(memstream_init(&ms));
 
         (void) sd_bus_message_dump(m, g, SD_BUS_MESSAGE_DUMP_WITH_HEADER);
 
@@ -39,7 +40,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
                 (void) sd_json_variant_dump(v, SD_JSON_FORMAT_PRETTY | SD_JSON_FORMAT_COLOR_AUTO, g, /* prefix= */ NULL);
 
         r = sd_bus_message_rewind(m, /* complete= */ true);
-        assert_se(r >= 0);
+        ASSERT_OK(r);
 
         return 0;
 }