* mpeg/psi.h, dvb/si.h: Add descXX_validate() functions. * mpeg/psi_print.h: Validate descriptors before accessing them. * mpeg/psi.h: Avoid duplicate copies of the CRC32 table. * ALL: Make sure we return booleans. * dvb/si.h: Add support for DVB character sets. * dvb/si.h: Add content delivery descriptors 0x43, 0x44 and 0x5a. * dvb/si.h: Add VBI teletext descriptor 0x46. * examples/dvb_print_si.c: Add support for charset conversion via iconv.

* mpeg/psi.h: Fix a bug with descriptor 0x05. * mpeg/psi.h, dvb/si.h: Cosmetic changes in print functions. * examples/dvb_print_si.c: New example file to print DVB tables in a TS stream.

* ALL: New *_print() set of functions. * ALL (tables): Check CRC only when needed; also check tables coherence. * ALL (descriptors): Add a lot of missing _get_ functions. * ALL (descriptors): Fix off-by-one overflow of structure array. * mpeg/psi.h: Fix off-by-one overflow of PAT program array.