Fix IP address multicast check #22
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isMulticastAddressused to read the octet at the wrong end of the given IP address to check if it is a multicast address, on both little and big endian systems. BytransformIP4ToU32always producing a big endian number andisMulticastAddressalways expecting one, it works now on both systems.Also, only test this if
readFromUcdrBuffersucceeds.