- improve the interface of rtti to pass meta_obj_t* as parameter of type function to easy to access private/data

- rename some macro with RTTI
- add RTTI_MAGIC in object header
- add new rtti api

testsuite/test_invalid_obj.c

@@ -0,0 +1,26 @@
+#include <errno.h>
+#include <stdarg.h>
+#include <unity/unity.h>
+
+#include "rtti.h"
+
+static void test_c_str_invalid(void)
+{
+    char* hello = "Hello, world";
+
+    TEST_ASSERT_TRUE(is_rtti_obj(hello) == 0);
+}
+
+static void test_intptr_invalid(void) {
+    int x = 20;
+
+    TEST_ASSERT_TRUE(is_rtti_obj(&x) == 0);
+}
+
+void test_invalid(void)
+{
+    printf("\n invalid object\n\n");
+
+    RUN_TEST(test_c_str_invalid);
+    RUN_TEST(test_intptr_invalid);
+}