Eo: use correct mask when checking if an id is a class

src/lib/eo/eo.c

@@ -153,8 +153,7 @@ _eo_is_a_class(const Eo *eo_id)
    if (!eo_id) return EINA_FALSE;
    oid = ((Eo_Header *) eo_id)->id;
 #endif
-   return ((((oid >> REF_TAG_SHIFT) & 0x1) == 0x0) &&
-         (oid & MASK_CLASS_TAG));
+   return (!(oid & MASK_OBJ_TAG) && (oid & MASK_CLASS_TAG));
 }
 
 static inline _Eo_Class *

src/lib/eo/eo_ptr_indirection.x

@@ -419,7 +419,7 @@ _eo_id_allocate(const _Eo_Object *obj)
 #else
    Eo_Id ret = 0x1;
    (void) obj;
-   return ret << REF_TAG_SHIFT;
+   return MASK_OBJ_TAG;
 #endif
 }