Compilation failed with openssl.

webrtc/base/opensslstreamadapter.cc

 /*
  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 347 matching lines @@
   if (!ssl_cipher) {
     return std::string();
   }
   char* cipher_name = SSL_CIPHER_get_rfc_name(ssl_cipher);
   std::string rfc_name = std::string(cipher_name);
   OPENSSL_free(cipher_name);
   return rfc_name;
 #else
   for (const SslCipherMapEntry* entry = kSslCipherMap; entry->rfc_name;
        ++entry) {
-    if (cipher_suite == entry->openssl_id) {
+    if (cipher_suite == static_cast<int>(entry->openssl_id)) {
       return entry->rfc_name;
     }
   }
   return std::string();
 #endif
 }
 
 bool OpenSSLStreamAdapter::GetSslCipherSuite(int* cipher_suite) {
   if (state_ != SSL_CONNECTED)
     return false;
@@ skipping 784 matching lines @@
     }
   } else {
     RTC_NOTREACHED();
     return kDefaultSslEcCipher12;
   }
 }
 
 }  // namespace rtc
 
 #endif  // HAVE_OPENSSL_SSL_H