[gnumeric] Tests: silence another glib leak.

[Morten Welinder <mortenw src gnome org>]

commit 9f1d3a447413223b7a0a91eff591f11e24728cf0
Author: Morten Welinder <terra gnome org>
Date:   Tue Mar 18 09:02:57 2014 -0400

    Tests: silence another glib leak.

 test/common.supp |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/test/common.supp b/test/common.supp
index 7fce7e6..237f27d 100644
--- a/test/common.supp
+++ b/test/common.supp
@@ -785,3 +785,10 @@
    fun:gdk_pixbuf_loader_write
    fun:new_from_data
 }
+
+{
+   GLIB/G_SETTING_BACKEND
+   Memcheck:Leak
+   ...
+   fun:g_settings_backend_get_default
+}