libdvbv5: fix reading multisection tables

libdvbv5: fix reading multisection tables

Unfortunately the section ids are not granted to be incremented by one.
This means the last section id is not necessarily equal to the total
number of sections. The only way to know if everything has been parsed, is
to stop when a repeating section id has been found.

The sections do not need to contain the same table id. In EIT for example,
the id designates the corresponding service.
Thus, allow the table id to differ.

Signed-off-by: André Roth <neolynx@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>