ComponentFeedbackMessageFilter should use equals() method to determine equality

http://svn.apache.org/viewvc/wicket/trunk/jdk-1.4/wicket/src/main/java/org/apache/wicket/feedback/ComponentFeedbackMessageFilter.java?revision=584925&view=markup

This is pretty trivial, but I think the ComponentFeedbackMessageFilter should use the the conventional .equals() method instead of "==" to determine object equality.

feel free to close this issue if there's a reason to be comparing object references instead of values:
http://www.leepoint.net/notes-java/data/expressions/22compareobjects.html