Bug 162140 [Progress] Be more resilient to null args in StatusLine's progress monitor
bundles/org.eclipse.jface/src/org/eclipse/jface/action/StatusLine.java
fStartTime = 0;
        if (fProgressBar != null) {
            fProgressBar.sendRemainingWork();
            fProgressBar.done();
        }
        setMessage(null);
        hideProgress();
    }
    /**
     * Returns the status line's progress monitor
     * @return {@link IProgressMonitor} the progress monitor
     */
    public IProgressMonitor getProgressMonitor() {
        return this;
    }
    /**
     * @private
     */
    protected void handleDispose() {
    	if (fStopButtonCursor != null) {
    		fStopButtonCursor.dispose();		
    		fStopButtonCursor = null;
    	}
    	if (fProgressBar != null) {
    		fProgressBar.dispose();
    		fProgressBar = null;
    	}
    }
    /**
     * Hides the Cancel button and ProgressIndicator.