nv_find
static struct nvhdr *nv_find(struct nv *nv, int type, const char *namefmt,
nvh = nv_find(nv, NV_TYPE_##TYPE, namefmt, nameap); \
nvh = nv_find(nv, NV_TYPE_##TYPE##_ARRAY, namefmt, nameap); \
nvh = nv_find(nv, NV_TYPE_STRING, namefmt, nameap);
nvh = nv_find(nv, NV_TYPE_NONE, namefmt, nameap);