Fix: lttng_triggers count is not equal to the size of the sorted trigger array

Fix: lttng_triggers count is not equal to the size of the sorted trigger array

Since anonymous triggers can be present in the original lttng_triggers
and that we do not add them to the sorting list, the count to be used
while iterating on the sorted list must be the size of the list itself
and not that of lttng_triggers.

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Change-Id: Ifb1802345199cb20fbb6d401f316be918b8a6443