#3147: HAProxyMessage.sourceAddress() can be null

.sourceAddress() is null when send-proxy-v2 & check option is used

proxy/src/main/java/net/md_5/bungee/netty/HandlerBoss.java

@@ -82,6 +82,8 @@ public class HandlerBoss extends ChannelInboundHandlerAdapter
         {
             HAProxyMessage proxy = (HAProxyMessage) msg;
             try
+            {
+                if ( proxy.sourceAddress() != null )
                 {
                     InetSocketAddress newAddress = new InetSocketAddress( proxy.sourceAddress(), proxy.sourcePort() );
 
@@ -91,6 +93,7 @@ public class HandlerBoss extends ChannelInboundHandlerAdapter
                     } );
 
                     channel.setRemoteAddress( newAddress );
+                }
             } finally
             {
                 proxy.release();