inline DISPATCH_ALWAYS_INLINE dispatch_block_private_data_s()

in src/block.cpp [61:80]

• 19 lines of code
• 5 McCabe index (conditional complexity)

	inline DISPATCH_ALWAYS_INLINE dispatch_block_private_data_s(
			dispatch_block_private_data_s const &o) noexcept :
			dbpd_magic(DISPATCH_BLOCK_PRIVATE_DATA_MAGIC),
			dbpd_flags(o.dbpd_flags), dbpd_atomic_flags(), dbpd_performed(),
			dbpd_priority(o.dbpd_priority), dbpd_voucher(o.dbpd_voucher),
			dbpd_block(), dbpd_group(), dbpd_queue(), dbpd_thread()
	{
		// copy constructor, create copy with retained references
		if (dbpd_voucher && dbpd_voucher != DISPATCH_NO_VOUCHER) {
			voucher_retain(dbpd_voucher);
		}
		if (o.dbpd_block) {
			dbpd_block = reinterpret_cast<dispatch_block_t>(
					_dispatch_Block_copy(o.dbpd_block));
		}
		_dispatch_block_private_data_debug("copy from %p, block: %p from %p",
				&o, dbpd_block, o.dbpd_block);
		if (!o.dbpd_magic) return; // No group in initial copy of stack object
		dbpd_group = _dispatch_group_create_and_enter();
	}