Compilation failed with openssl.

webrtc/base/opensslstreamadapter.cc

Index: webrtc/base/opensslstreamadapter.cc
diff --git a/webrtc/base/opensslstreamadapter.cc b/webrtc/base/opensslstreamadapter.cc
index abbb7158e183399e413a549ef3b6009ee57d1218..270faa0809f42013c01aeb35854d7c98b3b9cc1f 100644
--- a/webrtc/base/opensslstreamadapter.cc
+++ b/webrtc/base/opensslstreamadapter.cc
@@ -365,7 +365,7 @@ std::string OpenSSLStreamAdapter::SslCipherSuiteToName(int cipher_suite) {
 #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;
     }
   }