[gegl] tests: Silence -Wunused-variable

[Debarshi Ray <debarshir src gnome org>]

commit 0c6f3cca3e0ac8af6ce8e2cec1643b7073093e0f
Author: Debarshi Ray <debarshir gnome org>
Date:   Mon Mar 20 10:54:32 2017 +0100

    tests: Silence -Wunused-variable

 tests/simple/test-buffer-sharing.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/tests/simple/test-buffer-sharing.c b/tests/simple/test-buffer-sharing.c
index 94eccda..b80a86d 100644
--- a/tests/simple/test-buffer-sharing.c
+++ b/tests/simple/test-buffer-sharing.c
@@ -78,7 +78,6 @@ buffer_get_color(GeglBuffer *buffer) {
     const int pixels = 1;
     guint8 pixel[4];
     GeglRectangle r = { 0, 0, 1, pixels };
-    unsigned char contents[pixels*4];
     const Babl *format = babl_format("R'G'B'A u8");
     gegl_buffer_get(buffer, &r, 1.0, format, (gpointer)(pixel), GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_CLAMP);
     GeglColor *color = gegl_color_new(NULL);