rawdec: fix a typo -- || instead of |

Signed-off-by: Anton Khirnov <anton@khirnov.net>
cabac: remove unused argument of ff_init_cabac_states()

Signed-off-by: Anton Khirnov <anton@khirnov.net>
hqdn3d: Fix out of array read in LOWPASS

CC:libav-stable@libav.org
Signed-off-by: Anton Khirnov <anton@khirnov.net>