libipt: use pt_config_from_user() in pt_pkt_decoder_init()
libipt: use pt_config_from_user() in pt_pkt_decoder_init()

The packet decoder still checks the size of the configuration and fails
if it does not match exactly.  Fix it.

Change-Id: Ibbd875dfc4b4ceddab01a4962d016c308527a0c8
Signed-off-by: Markus Metzger <5f675b2b36595f90898e014b548ff7d9bbff2ab7@intel.com>

andikleen/processor-trace,01org/processor-trace,hoangt/processor-trace,01org/processor-trace,01org/processor-trace,hoangt/processor-trace,andikleen/processor-trace