gst_buffer_pool_get_config() returns a copy to the bufferpool's
configuration, which must be passed to gst_structure_free() after
use if not given away to gst_buffer_pool_set_config().
Fixes https://bugzilla.gnome.org/show_bug.cgi?id=734537
GST_DEBUG_OBJECT (pvrvideosink, "check existing pool caps");
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_get (config, &pcaps, &size, NULL, NULL, NULL, NULL);
+ gst_structure_free (config);
if (!gst_caps_is_equal (caps, pcaps)) {
GST_DEBUG_OBJECT (pvrvideosink, "pool has different caps");