ACP: Banning IPs by range fails to ban all IPs in range

When banning a range of IPs that should generate a "xxx.xxx.255.*" or "xxx.255.*.*" ban_ip database entry in phpbb_banlist the 255.* range is left out.

Example: Banning 0.0.251.0-0.0.1.1 generates ban_ip entries of

 0.0.251.*, 0.0.252.*, 0.0.253.*, 0.0.254.*, 0.1.0.*, 0.1.1.0 

0.0.255.* is missing.

Also, though perhaps I should raise this separately, banning a range such as 0.0.0.0-0.0.0.255 generates 256 individual ban_ip entries rather than one using a wildcard i.e. 0.0.0.* This is why I would ban this range using 0.0.0.0-0.0.1.0 then un-ban 0.0.1.0