Bug 113938 Report is marked dirty when open/close cascading parameter dialog without doing any operation on it
description: Report is marked dirty when open/close cascading parameter dialog without doing any operation on it steps to reproduce: 1.new a cascading parameter group 2.save the reprot 3.double click the cascading parameter to bring out edit box 4.click OK to close edit box actual result: Report has been marked dirty expected result: No dirty marked for that no operations done in edit parameter dialog
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ExpressionProvider.java
private ModuleHandle moduleHandle;
	private List filterList;
	/**
	 * Create a new expression provider with the given module
	 * 
	 * @param moduleHandle
	 *            the handle of the module
	 */
	public ExpressionProvider( ModuleHandle moduleHandle )
	{
		Assert.isNotNull( moduleHandle );
		this.moduleHandle = moduleHandle;
	}
	/**
	 * Create a new expression provider with the given module and dataset list
	 * 
	 * @param moduleHandle
	 *            the handle of the module
	 * @param dataSetList
	 *            the list of the data set
	 */
	public ExpressionProvider( ModuleHandle moduleHandle, List dataSetList )
	{
		this( moduleHandle );
		this.dataSetList = dataSetList;
	}
	/**
	 * Create a new expression provider with the current module
	 * 
	 * @param moduleHandle