[gimp] Fix for another potentially crashing and while.

[Alexia Death <alexiade src gnome org>]

commit f3f7b280799bc16af6800d9dcf59d1cfddd3c625
Author: Alexia Death <alexiadeath gmail com>
Date:   Sat Jun 6 19:25:13 2009 +0300

    Fix for another potentially crashing and while.
    
    This time in gimp_coords_interpolate_catmull. This should be
    the last one.
---
 app/core/gimpcoords-interpolate.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/app/core/gimpcoords-interpolate.c b/app/core/gimpcoords-interpolate.c
index 2a4259b..3b6575a 100644
--- a/app/core/gimpcoords-interpolate.c
+++ b/app/core/gimpcoords-interpolate.c
@@ -319,8 +319,7 @@ gimp_coords_interpolate_catmull (const GimpCoords   catmul_pt1,
 
       coords.direction = start_coords.direction + dir_step * n;
 
-      while (coords.direction > 1.0)
-        coords.direction -= 1.0;
+      coords.direction = coords.direction - floor (coords.direction);
 
       g_array_append_val (*ret_coords, coords);