core: type: fix registration of types that extend something other than b_object

core/include/blue/core/type.h

@@ -24,10 +24,15 @@ typedef const union b_type {
 	unsigned char b[16];
 } *b_type;
 
+typedef enum b_type_flags {
+	B_TYPE_F_ABSTRACT = 0x01u,
+} b_type_flags;
+
 typedef struct b_type_info {
 	union b_type t_id;
 	union b_type t_parent_id;
 	const char *t_name;
+	b_type_flags t_flags;
 	union b_type t_interfaces[B_TYPE_MAX_INTERFACES];
 	size_t t_nr_interfaces;
 	size_t t_class_size;