Occasionally happens when I attempt to zoom
java.lang.NullPointerException
at net.refractions.udig.tools.internal.Zoom.calculateOriginRect(Zoom.java:62)
at net.refractions.udig.tools.internal.Zoom.mouseDragged(Zoom.java:58)
at net.refractions.udig.project.render.displayAdapter.impl.EventJob.run(EventJob.java:106)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:66)