dhclient: wrong argument to memcpy

Affects 79110e52, affects dhcp-4.4.2.

client/dhclient.c:3384:         memcpy(&client_identifier.buffer->data + 5 - hw_len,
client/dhclient.c:3389:         memcpy(&client_identifier.buffer->data+(1+4),

These two lines look wrong. data is of type char[1] and its equivalent pointer would be char*. You would not want to take the address again, as the type of that (char**) leads to a different effect when adding +5.

The lines should be

client/dhclient.c:3384:         memcpy(client_identifier.buffer->data + 5 - hw_len,
client/dhclient.c:3389:         memcpy(client_identifier.buffer->data+(1+4),

If the source had declared unsigned char data[] instead of unsigend char data[1], this would have been caught.