mft: fix H264 helper cleaning
The p_dec->fmt_in->i_codec may have changed when the decoder is being closed. hh is initialized to default/empty values by default. p_obj is only set when it's being used.
The p_dec->fmt_in->i_codec may have changed when the decoder is being closed. hh is initialized to default/empty values by default. p_obj is only set when it's being used.
VideoLAN code repository instance