[gtk/modern-testsuite] reftest: Plug a memory leak

[Matthias Clasen <matthiasc src gnome org>]

commit 86b4cd1a0b2dbf2e9a97f1dc1ba6a02f6dd74588
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Sep 16 13:09:46 2021 -0400

    reftest: Plug a memory leak

 testsuite/reftests/reftest-compare.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/testsuite/reftests/reftest-compare.c b/testsuite/reftests/reftest-compare.c
index bb6c6ebc1a..3964205abe 100644
--- a/testsuite/reftests/reftest-compare.c
+++ b/testsuite/reftests/reftest-compare.c
@@ -74,6 +74,8 @@ buffer_diff_core (const guchar *buf_a,
                                              bytes,
                                              stride_diff);
               row = (guint32 *) (buf_diff + y * stride_diff);
+
+              g_bytes_unref (bytes);
             }
 
           /* calculate a difference value for all 4 channels */