[gegl] Fix unused variable warning

[Daniel Sabo <daniels src gnome org>]

commit 09213cfa6bbdc37edda767abb63fedec5c73daeb
Author: Daniel Sabo <DanielSabo gmail com>
Date:   Wed Jun 5 00:11:50 2013 -0700

    Fix unused variable warning

 gegl/gegl-matrix.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gegl/gegl-matrix.c b/gegl/gegl-matrix.c
index 48a455e..48bad21 100644
--- a/gegl/gegl-matrix.c
+++ b/gegl/gegl-matrix.c
@@ -215,7 +215,7 @@ gegl_matrix3_transform_point (GeglMatrix3 *matrix,
                               gdouble     *x,
                               gdouble     *y)
 {
-  gdouble xp, yp, w, cw;
+  gdouble xp, yp, w;
   
   w = (*x * matrix->coeff [2][0] + *y * matrix->coeff [2][1] + matrix->coeff [2][2]);