[gegl] transform-ops: make c90 compliant

[Øyvind Kolås <ok src gnome org>]

commit 44c6f47dc7745c914a6adf6364383dae40700b28
Author: Øyvind Kolås <pippin gimp org>
Date:   Wed Apr 12 01:10:45 2017 +0200

    transform-ops: make c90 compliant

 operations/transform/transform-core.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/operations/transform/transform-core.c b/operations/transform/transform-core.c
index 002cb01..fa41a75 100644
--- a/operations/transform/transform-core.c
+++ b/operations/transform/transform-core.c
@@ -788,12 +788,13 @@ transform_affine (GeglOperation       *operation,
                                          level);
 
   GeglRectangle  dest_extent = *roi;
+  GeglSamplerGetFun sampler_get_fun = gegl_sampler_get_fun (sampler);
+
   dest_extent.x >>= level;
   dest_extent.y >>= level;
   dest_extent.width >>= level;
   dest_extent.height >>= level;
 
-  GeglSamplerGetFun sampler_get_fun = gegl_sampler_get_fun (sampler);