Stop warning about deliberate unnecessary cast

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@940070 13f79535-47bb-0310-9956-ffa450edef68

httpclient/src/main/java/org/apache/http/conn/ssl/SSLSocketFactory.java

@@ -337,6 +337,7 @@ public class SSLSocketFactory implements LayeredSchemeSocketFactory, LayeredSock
     /**
      * @since 4.1
      */
+    @SuppressWarnings("cast")
     public Socket createSocket(final HttpParams params) throws IOException {
         // the cast makes sure that the factory is working as expected
         return (SSLSocket) this.socketfactory.createSocket();