Fix a small logic error in ast_event_iterator_next. The previous logic allowed for the iterator

to indicate there was more data than there really was, causing the iterator read beyond the end
of the event structure. This led to invalid memory reads and potential crashes.



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@103559 65c4cc65-6c06-0410-ace0-fbb531ad65f3