psyrd: use zero stride in psyCost C reference, minor optimization
sei: repair decoded picture hash SEI
sei: add m_ prefix to members of SEIDecodedPictureHash for consistency
sei: allow SEI classes to implement write() directly to avoid two-pass encode
writer: xConvertToUInt did not need to be a class member
pic: better name for picture timing SEI member
sei: remove unused RESERVED hash method, avoid compiler warnings