[python] fix double return

std/python/_std/sys/net/Socket.hx

@@ -90,13 +90,13 @@ private class SocketOutput extends haxe.io.Output {
     }
 
     public override function writeBytes( buf : haxe.io.Bytes, pos : Int, len : Int) : Int {
-        return try {
+        try {
             var data    = buf.getData();
             var payload = python.Syntax.pythonCode("data[pos:pos+len]");
             var r = __s.send(payload,0);
             return r;
         } catch( e : BlockingIOError ) {
-                throw Blocked;
+            throw Blocked;
         }
     }