change SessionEvent::Immediate to -1, and ensure that clear_events() uses it rather than a hard-coded value

This fixes a design error of using zero as the flag for an "Immediate" event's action frame. Zero
is a perfectly legitimate action frame for an event (e.g. a Skip event), and using zero was causing
skip events with action-frame == 0 to be treated as immediate, not scheduled.

0 files changed, 0 insertions, 0 deletions