Correctly handle the INPUT_EVENT_ITEM_META and INPUT_EVENT_ITEM_META
instead of skipping the whole event processing code without even freeing
the callback_info_t data structure.

Closes: #8285
(cherry picked from commit 01b2d9f038211e91fd2348858d58931f0a48faa1)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>