This commit was manufactured by cvs2svn to create branch 'TARGET_321'.
Cherrypick from master 2006-06-22 18:23:08 UTC Darin Wright <darin> 'Bug 144253 [source lookup] Stack Frame CHANGE events no longer force a source lookup':
org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/viewers/update/StackFrameEventHandler.java