Bug 213680 [2.2.2]Chart script can not be cleaned completely.
Description: Reset script or delete all script does not work. build version: v20071221-0630 steps to reproduce: 1. New a report. 2. New a chart. 3. Enter some script for the chart and save the report. 4. Click the reset scirpt button or delete all script. 5. Save the report and switch to layout,then switch back to script page. Expected result: Script are cleaned. Actual result: Script are not cleaned. Note: If you delete part of the script, it works.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/writer/ModuleWriter.java
if ( propDefn.getTypeCode( ) == IPropertyType.SCRIPT_TYPE )
			cdata = true;
		if ( withoutName )
			writeEntry( tag, null, null, xml, cdata );
		else
			writeEntry( tag, memberName, null, xml, cdata );
	}
	/**
	 * Writes the resource key entry.
	 * 
	 * @param tagName
	 *            the tag name to write
	 * @param name
	 *            the property name of resource
	 * @param key
	 *            the resource key value
	 * @param xml
	 *            the resource value
	 * @param cdata
	 *            whether the resource value should be written as CDATA.
	 */
	protected void writeResouceKey( String tagName, String name, String key,
			String xml, boolean cdata )
	{
		
		if ( key == null && xml == null )
			return;
		writer.startElement( tagName );
		writer.attribute( DesignSchemaConstants.NAME_ATTRIB, name );
		writer.attribute( DesignSchemaConstants.KEY_ATTRIB, key );