Fix a compilation warning

servo · nox · Jul 3, 2016 · Jul 3, 2016 · Jul 3, 2016 · e6a4a56a220c57550803901c4b6b1a8c20cb9333
commit e6a4a56a220c57550803901c4b6b1a8c20cb9333
diff --git a/src/render_backend.rs b/src/render_backend.rs
@@ -237,7 +237,7 @@ impl RenderBackend {
                         ApiMsg::TranslatePointToLayerSpace(point, tx) => {
                             // First, find the specific layer that contains the point.
                             let point = point / self.device_pixel_ratio;
-                            if let (Some(root_pipeline_id), Some(root_scroll_layer_id)) =
+                            if let (Some(_), Some(root_scroll_layer_id)) =
                                     (self.scene.root_pipeline_id,
                                      self.frame.root_scroll_layer_id) {
                                 if let Some(scroll_layer_id) =