message: Check nVersion before sending out sendcmpct p2p message: fixes
  Make sure the peer is above or equal to the COMPACTBLOCKS_VERSION before
  sending a sendcmpct message.
diff: @@ -376,7 +376,7 @@ static void enableSendHeaders(CNode *pfrom)
  static void enableCompactBlocks(CNode *pfrom)
  {
  // Tell our peer that we support compact blocks
  - if (IsCompactBlocksEnabled())
  + if (IsCompactBlocksEnabled() && (pfrom->nVersion >= COMPACTBLOCKS_VERSION))
  {
  bool fHighBandwidth = false;
  uint64_t nVersion = 1;
  