[librsvg: 12/15] draw_tree: Don't get the cr's matrix twice

[Federico Mena Quintero <federico src gnome org>]

commit 39c9fcfc78d029cbf08a49422d6fc3797c57d66e
Author: Federico Mena Quintero <federico gnome org>
Date:   Wed Nov 18 10:19:50 2020 -0600

    draw_tree: Don't get the cr's matrix twice

 src/drawing_ctx.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/drawing_ctx.rs b/src/drawing_ctx.rs
index 9aa4239a..de63fd33 100644
--- a/src/drawing_ctx.rs
+++ b/src/drawing_ctx.rs
@@ -204,8 +204,8 @@ pub fn draw_tree(
     // the top/left of the viewport"
 
     // Translate so (0, 0) is at the viewport's upper-left corner.
-    cr.translate(viewport.x0, viewport.y0);
-    let transform = Transform::from(cr.get_matrix());
+    let transform = user_transform.pre_translate(viewport.x0, viewport.y0);
+    cr.set_matrix(transform.into());
 
     // Per the spec, so the viewport has (0, 0) as upper-left.
     let viewport = viewport.translate((-viewport.x0, -viewport.y0));