[gtk+/gtk-3-22] testheightforwidth: Add missing unref

[Daniel Boles <dboles src gnome org>]

commit 0349574b477bf8febde96d9d3ff50819c5ae7dea
Author: Daniel Boles <dboles src gnome org>
Date:   Mon Mar 6 20:57:17 2017 +0000

    testheightforwidth: Add missing unref

 tests/testheightforwidth.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/tests/testheightforwidth.c b/tests/testheightforwidth.c
index 4eb2222..cb76f19 100644
--- a/tests/testheightforwidth.c
+++ b/tests/testheightforwidth.c
@@ -939,7 +939,10 @@ test_clicked (GtkWidget     *button,
         {
           g_printerr ("GtkBuilder for interface \"%s\" returned error \"%s\"\n",
                       interface->name, error->message);
+
           g_error_free (error);
+          g_object_unref (builder);
+
           return;
         }