loci: add missing test for of_object_new_from_message

Also fix embarassing typos in test_of_object_new_from_message_preallocated.
diff --git a/c_gen/templates/locitest/test_utils.c b/c_gen/templates/locitest/test_utils.c
index 563f510..10a6b3d 100644
--- a/c_gen/templates/locitest/test_utils.c
+++ b/c_gen/templates/locitest/test_utils.c
@@ -119,6 +119,29 @@
 }
 
 static int
+test_of_object_new_from_message(void)
+{
+    /* v1 OFPT_HELLO, xid=0x12345678 */
+    uint8_t data[] = { 0x01, 0x00, 0x00, 0x08, 0x12, 0x34, 0x56, 0x78 };
+    uint8_t *buf = malloc(sizeof(data));
+    memcpy(buf, data, sizeof(data));
+
+    of_object_t *obj = of_object_new_from_message(buf, sizeof(data));
+
+    TEST_ASSERT(obj != NULL);
+    TEST_ASSERT(obj->version == OF_VERSION_1_0);
+    TEST_ASSERT(obj->object_id == OF_HELLO);
+
+    uint32_t xid;
+    of_hello_xid_get(obj, &xid);
+    TEST_ASSERT(xid == 0x12345678);
+
+    of_object_delete(obj);
+
+    return TEST_PASS;
+}
+
+static int
 test_of_object_new_from_message_preallocated(void)
 {
     /* v1 OFPT_HELLO, xid=0x12345678 */
@@ -129,8 +152,8 @@
         &storage, buf, sizeof(buf));
 
     TEST_ASSERT(obj != NULL);
-    TEST_ASSERT(obj->version = OF_VERSION_1_0);
-    TEST_ASSERT(obj->object_id = OF_HELLO);
+    TEST_ASSERT(obj->version == OF_VERSION_1_0);
+    TEST_ASSERT(obj->object_id == OF_HELLO);
 
     uint32_t xid;
     of_hello_xid_get(obj, &xid);
@@ -143,6 +166,7 @@
 run_utility_tests(void)
 {
     RUN_TEST(has_outport);
+    RUN_TEST(of_object_new_from_message);
     RUN_TEST(of_object_new_from_message_preallocated);
     RUN_TEST(dump_objs);