array.h: avoid duplicated defined of `MRB_ARY_NO_EMBED`; fix
*/
MRB_BEGIN_DECL
-
typedef struct mrb_shared_array {
int refcnt;
mrb_ssize len;
mrb_value *ptr;
} mrb_shared_array;
-#if defined(MRB_32BIT) && defined(MRB_NO_BOXING) && !defined(MRB_USE_FLOAT32)
+#if defined(MRB_32BIT) && defined(MRB_NO_BOXING) && !defined(MRB_USE_FLOAT32) && !defined(MRB_ARY_NO_EMBED)
# define MRB_ARY_NO_EMBED
+#endif
+
+#ifdef MRB_ARY_NO_EMBED
# define MRB_ARY_EMBED_LEN_MAX 0
#else
# define MRB_ARY_EMBED_LEN_MAX ((mrb_int)(sizeof(void*)*3/sizeof(mrb_value)))
