[librsvg/librsvg-2.44] compute_text_bbox(): Don't mutate the bbox directly; use its methods

[Federico Mena Quintero <federico src gnome org>]

commit 7083a6fd49708c78248849a347016bc8d7dfdc4d
Author: Federico Mena Quintero <federico gnome org>
Date:   Tue Sep 25 17:53:03 2018 -0500

    compute_text_bbox(): Don't mutate the bbox directly; use its methods

 rsvg_internals/src/drawing_ctx.rs | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)
---
diff --git a/rsvg_internals/src/drawing_ctx.rs b/rsvg_internals/src/drawing_ctx.rs
index fd2aa020..b7f8ad22 100644
--- a/rsvg_internals/src/drawing_ctx.rs
+++ b/rsvg_internals/src/drawing_ctx.rs
@@ -864,30 +864,26 @@ fn compute_text_bbox(
 ) -> BoundingBox {
     let pango_scale = f64::from(pango::SCALE);
 
-    let mut bbox = BoundingBox::new(affine);
-
     let ink_x = f64::from(ink.x);
     let ink_y = f64::from(ink.y);
     let ink_width = f64::from(ink.width);
     let ink_height = f64::from(ink.height);
 
     if gravity_is_vertical(gravity) {
-        bbox.rect = Some(cairo::Rectangle {
+        BoundingBox::new(affine).with_rect(Some(cairo::Rectangle {
             x: x + (ink_x - ink_height) / pango_scale,
             y: y + ink_y / pango_scale,
             width: ink_height / pango_scale,
             height: ink_width / pango_scale,
-        });
+        }))
     } else {
-        bbox.rect = Some(cairo::Rectangle {
+        BoundingBox::new(affine).with_rect(Some(cairo::Rectangle {
             x: x + ink_x / pango_scale,
             y: y + ink_y / pango_scale,
             width: ink_width / pango_scale,
             height: ink_height / pango_scale,
-        });
+        }))
     }
-
-    bbox
 }
 
 fn compute_stroke_and_fill_box(cr: &cairo::Context, values: &ComputedValues) -> BoundingBox {