Removed the listener array if it is empty after a removal
Removed the listener array if it is empty after a removal

Olical/EventEmitter,Wolfy87/EventEmitter,modulexcite/EventEmitter,Wolfy87/EventEmitter,modulexcite/EventEmitter,Olical/EventEmitter,oculus42/EventEmitter,Olical/EventEmitter,oculus42/EventEmitter