[librsvg] test-utils.c: Fix a leak

[Federico Mena Quintero <federico src gnome org>]

commit d996f28269b7b66c1bc0d9042e2e809d2114ea3f
Author: Federico Mena Quintero <federico gnome org>
Date:   Mon Sep 4 16:53:41 2017 -0500

    test-utils.c: Fix a leak

 tests/test-utils.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/tests/test-utils.c b/tests/test-utils.c
index e7506b1..40d3d07 100644
--- a/tests/test-utils.c
+++ b/tests/test-utils.c
@@ -63,6 +63,7 @@ test_utils_add_test_for_all_files (const gchar   *prefix,
         relative_path = g_file_get_path (file);
 
       test_path = g_strconcat (prefix, "/", relative_path, NULL);
+      g_free (relative_path);
       
       g_test_add_data_func_full (test_path, g_object_ref (file), test_func, g_object_unref);