[epiphany] prefs-dialog: plug a leaked string

[Claudio Saavedra <csaavedra src gnome org>]

commit 1a787457441dd10e89960444eb7993f68e6824e3
Author: Claudio Saavedra <csaavedra igalia com>
Date:   Mon Dec 8 17:44:24 2014 +0100

    prefs-dialog: plug a leaked string

 src/prefs-dialog.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/prefs-dialog.c b/src/prefs-dialog.c
index e2ec4b2..1a62427 100644
--- a/src/prefs-dialog.c
+++ b/src/prefs-dialog.c
@@ -258,6 +258,7 @@ combo_get_mapping (GValue *value,
                if (g_strcmp0 (item_name, settings_name) == 0)
                {
                        g_value_set_int (value, i);
+                       g_free (item_name);
                        break;
                }