The ban list is stored in a format so-called CitraRoom-BanList-1 and just first stores username ban list, one entry per line, then an empty line and then store the ip ban list.
If the variable we're checking is a u16, then there can never be values
outside of the 0-65535 range. This is bad because an arbitrary larger
value can be truncated down into a valid value, making an otherwise
malformed argument well-formed.
Change it to use u32 to allow the check to function properly.
