ipconfig may not be word aligned

[larry-xmos]

xC compiler doesn't word align local arrays on the stack at the moment. While this may or may not change in the future, uip_server_init is casting char[4] in ipconfig that's passed to int*, which is not very good code. Suggest using memcmp or a for loop.

if (ipconfig != NULL && (*((int*)ipconfig->ipaddr) != 0)) {