fix boost::network::uri::decode error - out of range because of '%'

Author: cnagune

boost/network/uri/decode.hpp

@@ -59,8 +59,14 @@ OutputIterator decode(const InputIterator &in_begin,
   while (it != in_end) {
     if (*it == '%') {
       ++it;
+	  if (it == in_end) {
+		throw std::runtime_error("decoding fail because of '%'");
+	  }
       value_type v0 = detail::letter_to_hex(*it);
       ++it;
+	  if (it == in_end) {
+		throw std::runtime_error("decoding fail because of '%'");
+	  }
       value_type v1 = detail::letter_to_hex(*it);
       ++it;
       *out++ = 0x10 * v0 + v1;