Xtonlsab bug

[Joakim Tjernlund]

Ondrej, this looks buggy:

+static inline void htonlsab(void *h, void *n, u16 len) { memcpy(n, h, len); };
+static inline void ntohlsab(void *n, void *h, u16 len) { memcpy(h, n, len); };

memcpy is not defined to handle overlapping memory. Best to add:
if (n != h)
  memcpy(...)

Might as well do that for these too:
+static inline void htonlsah(struct ospf_lsa_header *h, struct ospf_lsa_header *n) { *n = *h; };
+static inline void ntohlsah(struct ospf_lsa_header *n, struct ospf_lsa_header *h) { *h = *n; };