[librsvg] viewport.rs: Make the order of operations consistent

[Federico Mena Quintero <federico src gnome org>]

commit e9cd4983e2197e8fdefefbe30b5e2c9903903359
Author: Federico Mena Quintero <federico gnome org>
Date:   Thu Sep 28 09:05:28 2017 -0500

    viewport.rs: Make the order of operations consistent

 rust/src/viewport.rs |   14 +++++++-------
 1 files changed, 7 insertions(+), 7 deletions(-)
---
diff --git a/rust/src/viewport.rs b/rust/src/viewport.rs
index 2e37856..394323d 100644
--- a/rust/src/viewport.rs
+++ b/rust/src/viewport.rs
@@ -103,6 +103,10 @@ fn in_viewport<F>(ctx: &mut ViewportCtx,
             // https://www.w3.org/TR/SVG/coords.html#ViewBoxAttribute
             return;
         }
+
+        ctx.push_view_box(vbox.0.width, vbox.0.height);
+        ctx.push_discrete_layer();
+
         let (x, y, w, h) = preserve_aspect_ratio.compute(vbox.0.width, vbox.0.height,
                                                          vx, vy, vw, vh);
 
@@ -112,19 +116,15 @@ fn in_viewport<F>(ctx: &mut ViewportCtx,
 
         ctx.set_affine(affine);
 
-        ctx.push_view_box(vbox.0.width, vbox.0.height);
-
-        ctx.push_discrete_layer();
-
         if do_clip && clip_mode == ClipMode::ClipToVbox {
             ctx.add_clipping_rect(vbox.0.x, vbox.0.y, vbox.0.width, vbox.0.height);
         }
     } else {
-        affine.translate(vx, vy);
-        ctx.set_affine(affine);
-
         ctx.push_view_box(vw, vh);
         ctx.push_discrete_layer();
+
+        affine.translate(vx, vy);
+        ctx.set_affine(affine);
     }
 
     if do_clip && clip_mode == ClipMode::ClipToViewport {