- add boundary checking
- add doxygen comment
- fix some typos.
- fix L1L2MERGE macro

Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

The API in version 1.0.0 has changed and the macros dvbpsi_New*/dvbpsi_Delete* have been
deprecated (and removed).

Remove unnecessary #ifndef BSD. netinet/ip.h is a standard header on *BSD. Also, most BSDs don't define "BSD".
Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

The transport stream loop started 2 bytes too far and the while() condition was
pointing to 2 bytes too soon. The code has been corrected to first add 2 bytes
to the current position, thereby skipping the length fields (which have already
been read). Now the loop starts at the correct position.

The member i_crc is not used anymore now the CRC32 can be checked and
generated by the dvbpsi_BuildPSISection() and dvbpsi_ValidPSISection()
functions.