[gegl] workshop/gradient-map: enclose local variables in block

[Øyvind Kolås <ok src gnome org>]

commit 6534ab4a5ca1bf6354000f3ccca0b0cf59df7945
Author: Øyvind Kolås <pippin gimp org>
Date:   Fri Mar 25 01:37:20 2016 +0100

    workshop/gradient-map: enclose local variables in block

 operations/workshop/gradient-map.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/operations/workshop/gradient-map.c b/operations/workshop/gradient-map.c
index 0f7ffc2..cf5415c 100644
--- a/operations/workshop/gradient-map.c
+++ b/operations/workshop/gradient-map.c
@@ -115,10 +115,12 @@ create_linear_gradient(GeglColor **colors, gdouble *stops, const gint no_stops,
             rgba_from_gegl_color(&from, colors[from_stop], format);
             rgba_from_gegl_color(&to, colors[to_stop], format);
         }
+        {
         const float from_pos = (from_stop < 0) ? 0.0 : stops[from_stop];
         const float weight = ((to_stop-from_stop) == 0) ? 1.0 : mapf(pos, from_pos, to_pos, 0.0, 1.0);
         const size_t offset = px*channels;
         pixel_interpolate_gradient(samples, offset, &from, &to, weight);
+        }
     }
     return samples;
 }