[gegl] buffer: fix caching of fetch function in sampler_prepare

[Øyvind Kolås <ok src gnome org>]

commit 808f3234b7b200d1bc63acf22e325152cad4d9bc
Author: Øyvind Kolås <pippin gimp org>
Date:   Tue Jul 1 02:25:48 2014 +0200

    buffer: fix caching of fetch function in sampler_prepare

 gegl/buffer/gegl-sampler.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/gegl/buffer/gegl-sampler.c b/gegl/buffer/gegl-sampler.c
index bebdd1b..39ae96d 100644
--- a/gegl/buffer/gegl-sampler.c
+++ b/gegl/buffer/gegl-sampler.c
@@ -156,6 +156,8 @@ gegl_sampler_prepare (GeglSampler *self)
   if (!self->format)
     self->format = self->buffer->soft_format;
 
+  self->get = klass->get; /* cache the sampler in the instance */
+  /* migh be overridden by samplers prepare*/
   if (klass->prepare)
     klass->prepare (self);
 
@@ -169,7 +171,6 @@ gegl_sampler_prepare (GeglSampler *self)
   self->level[0].sampler_rectangle.width = 0;
   self->level[0].sampler_rectangle.height = 0;
 
-  self->get = klass->get; /* cache the sampler in the instance */
 }
 
 void