[librsvg/librsvg-2.46] turbolence: remove identity conversion

[Federico Mena Quintero <federico src gnome org>]

commit 3d18fd18d160ae29516de5e4e3dca793e323a311
Author: Paolo Borelli <pborelli gnome org>
Date:   Sun Oct 13 12:25:08 2019 +0200

    turbolence: remove identity conversion

 rsvg_internals/src/filters/turbulence.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/rsvg_internals/src/filters/turbulence.rs b/rsvg_internals/src/filters/turbulence.rs
index f491dc41..8e5743ad 100644
--- a/rsvg_internals/src/filters/turbulence.rs
+++ b/rsvg_internals/src/filters/turbulence.rs
@@ -256,8 +256,8 @@ impl NoiseGenerator {
         let b10 = self.lattice_selector[j + by0];
         let b01 = self.lattice_selector[i + by1];
         let b11 = self.lattice_selector[j + by1];
-        let sx = f64::from(s_curve(rx0));
-        let sy = f64::from(s_curve(ry0));
+        let sx = s_curve(rx0);
+        let sy = s_curve(ry0);
         let q = self.gradient[color_channel][b00];
         let u = rx0 * q[0] + ry0 * q[1];
         let q = self.gradient[color_channel][b10];