Comment 2 for bug 1294384

StacktraceTop:
 ?? ()
 g_hash_table_lookup_node (hash_return=<synthetic pointer>, key=0x29f5960, hash_table=0x7f7f84005ac0) at /build/buildd/glib2.0-2.39.91/./glib/ghash.c:368
 g_hash_table_lookup (hash_table=0x7f7f84005ac0, key=key@entry=0x29f5960) at /build/buildd/glib2.0-2.39.91/./glib/ghash.c:1092
 cc_appearance_xml_load_xml_internal (xml=xml@entry=0x7f7f84005b20, filename=filename@entry=0x2a2a320 "/usr/share/gnome-background-properties/trusty-wallpapers.xml", in_thread=in_thread@entry=0) at cc-appearance-xml.c:303
 gnome_wp_file_changed (monitor=<optimized out>, file=<optimized out>, other_file=<optimized out>, event_type=<optimized out>, data=0x7f7f84005b20) at cc-appearance-xml.c:337