[0.0107] scripted event tweak

Description: Once first door is oppenned, some scripted event are available, and some of them may create strange situation.



Steps to reproduce:
1. Unlock first door
2. Go back, whithout falling from the window

Result: Some of the door oppenned by scripted event are empty, little silver army does not appear.

By design. This is ok as long as we don't see the enemy spawning.