lisa.trace: Fix typo in has_events() leading to returning True
lisa.trace: Fix typo in has_events() leading to returning True

When a list of events is checked, has_events() would always return True.
Fix the typo so it checks the events that were asked for.

ARM-software/lisa,ARM-software/lisa,ARM-software/lisa,credp/lisa,ARM-software/lisa,credp/lisa,credp/lisa,credp/lisa