getaddrinfo.h: handle undefined EAI_NODATA * lib/getaddrinfo.h [!defined EAI_NODATA && defined EAI_NONAME] (EAI_NODATA): Define. * tests/test-getaddrinfo.c (EAI_NODATA): Don't define here. This also reverts c9a6a9bb007294bb8878d685f3e9336b3a5be1ed.