AbstractImageReference.update() not lazy-aware
Brought to you by:
tliebeck
submitted by: jsirois@threewide.com
version: echo1.1rc1
nextapp.echo.AbstractImageReference neglects a null
check on listenerList member variable on line 74 - rest
of code is lazy-initialization aware.
Easy to fix via subclassing - but looks like the fix
belongs in this class.