message: Replace c-style cast with c++ style static_cast.
diff: @@ -575,7 +575,7 @@ public:
  opcodetype opcode;
  do
  {
  - while (end() - pc >= (long)b.size() && std::equal(b.begin(), b.end(), pc))
  + while (static_cast<size_t>(end() - pc) >= b.size() && std::equal(b.begin(), b.end(), pc))
  {
  pc = erase(pc, pc + b.size());
  ++nFound;
  