[gnome-photos/gnome-3-24] operation-insta-hefe-curve: Use single precision floating point

[Debarshi Ray <debarshir src gnome org>]

commit 8fc4de81df5fb0aaf0fcc8d11d8a616084493c10
Author: Debarshi Ray <debarshir gnome org>
Date:   Mon Dec 11 00:27:54 2017 +0100

    operation-insta-hefe-curve: Use single precision floating point
    
    Single precision floating point is all that's needed. It is wasteful to
    promote calculations to double precision through the use of such
    literals. This can have significant performance impact on architectures
    like ARM.

 src/photos-operation-insta-hefe-curve.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/src/photos-operation-insta-hefe-curve.c b/src/photos-operation-insta-hefe-curve.c
index b15a038..3ed7a3f 100644
--- a/src/photos-operation-insta-hefe-curve.c
+++ b/src/photos-operation-insta-hefe-curve.c
@@ -77,9 +77,9 @@ photos_operation_insta_hefe_curve_process (GeglOperation *operation,
       const float r2 = r * r;
       const float r3 = r2 * r;
 
-      out[0] = -13.47f * r3 * r3 + 41.23f * r3 * r2 - 45.04f * r2 * r2 + 19.17 * r3 - 1.492f * r2 + 0.5954f 
* r;
-      out[1] = -12.28f * g3 * g3 + 41.09f * g3 * g2 - 50.52f * g2 * g2 + 26.03 * g3 - 3.916f * g2 + 0.58f * 
g;
-      out[2] = -1.066f * b3 * b3 + 9.679f * b3 * b2 - 19.09f * b2 * b2 + 12.92 * b3 - 1.835f * b2 + 0.3487f 
* b;
+      out[0] = -13.47f * r3 * r3 + 41.23f * r3 * r2 - 45.04f * r2 * r2 + 19.17f * r3 - 1.492f * r2 + 0.5954f 
* r;
+      out[1] = -12.28f * g3 * g3 + 41.09f * g3 * g2 - 50.52f * g2 * g2 + 26.03f * g3 - 3.916f * g2 + 0.58f * 
g;
+      out[2] = -1.066f * b3 * b3 + 9.679f * b3 * b2 - 19.09f * b2 * b2 + 12.92f * b3 - 1.835f * b2 + 0.3487f 
* b;
       out[3] = in[3];
 
       in += 4;