coverity 83678 unused assignment

Signed-off-by: Andy Green <andy.green@linaro.org>
diff --git a/lib/extension.c b/lib/extension.c
index 1e8370c..b7a5792 100644
--- a/lib/extension.c
+++ b/lib/extension.c
@@ -144,11 +144,8 @@
 			}
 
 			/* always either sent it all or privately buffered */
-			if (wsi->u.ws.clean_buffer) {
-				eff_buf.token_len = n;
+			if (wsi->u.ws.clean_buffer)
 				len = n;
-			}
-
 		}
 
 		lwsl_parser("written %d bytes to client\n", n);