[librsvg] transform_rect() - Avoid an allocation and simplify the loop a bit

[Federico Mena Quintero <federico src gnome org>]

commit 572e5ef1de97ef247ac9a1cac2e6795b76a93eee
Author: Federico Mena Quintero <federico gnome org>
Date:   Wed Apr 22 17:45:05 2020 -0500

    transform_rect() - Avoid an allocation and simplify the loop a bit

 rsvg_internals/src/transform.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/rsvg_internals/src/transform.rs b/rsvg_internals/src/transform.rs
index 4898f1fc..f338ede0 100644
--- a/rsvg_internals/src/transform.rs
+++ b/rsvg_internals/src/transform.rs
@@ -156,7 +156,7 @@ impl Transform {
     }
 
     pub fn transform_rect(&self, rect: &Rect) -> Rect {
-        let points = vec![
+        let points = [
             self.transform_point(rect.x0, rect.y0),
             self.transform_point(rect.x1, rect.y0),
             self.transform_point(rect.x0, rect.y1),
@@ -169,7 +169,7 @@ impl Transform {
             (x, y, x, y)
         };
 
-        for &(x, y) in points.iter().take(4).skip(1) {
+        for &(x, y) in points.iter().skip(1) {
             if x < xmin {
                 xmin = x;
             }