[gimp/gimp-2-8] Revert "app: properly sample lanczos kernel luts"

[Massimo Valentini <mvalentini src gnome org>]

commit 8754a060bdf76d0bd9af4542af5fc3009c4a2f8f
Author: Massimo Valentini <mvalentini src gnome org>
Date:   Tue Apr 28 07:18:41 2015 +0200

    Revert "app: properly sample lanczos kernel luts"
    
    This reverts commit 7172911becb8f6ce1ded151dd113d727cad0d811.
    
    see Bug 748536 for an explanation.

 app/paint-funcs/scale-region.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/app/paint-funcs/scale-region.c b/app/paint-funcs/scale-region.c
index 3a7c337..e98b8ec 100644
--- a/app/paint-funcs/scale-region.c
+++ b/app/paint-funcs/scale-region.c
@@ -902,7 +902,7 @@ sinc (const gdouble x)
 gfloat *
 create_lanczos_lookup (void)
 {
-  const gdouble dx = LANCZOS_MIN;
+  const gdouble dx = LANCZOS_WIDTH / (gdouble) (LANCZOS_SAMPLES - 1);
 
   gfloat  *lookup = g_new (gfloat, LANCZOS_SAMPLES);
   gdouble  x      = 0.0;
@@ -921,7 +921,7 @@ create_lanczos_lookup (void)
 static gfloat *
 create_lanczos3_lookup (void)
 {
-  const gdouble dx = LANCZOS_MIN;
+  const gdouble dx = 3.0 / (gdouble) (LANCZOS_SAMPLES - 1);
 
   gfloat  *lookup = g_new (gfloat, LANCZOS_SAMPLES);
   gdouble  x      = 0.0;