Bug 153378 [Regression]Label text won't show up when the text key is not found
Steps to reproduce: 1.Add a label, set text to "aaa" 2.Add a resource file "a" to the report, add a text key "k1" which is not in the a.properties to the label 3.Preview in Web Viewer Expected result: Label display "aaa" when the text key is not found Actual result: Nothing in preview
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/ReferencableStructure.java
/**
	 * Name of the "libReference" property.
	 */
	public static final String LIB_REFERENCE_MEMBER = "libReference"; 
	/**
	 * The list of cached clients.
	 */
	protected ArrayList clients = new ArrayList( );
	/**
	 * The library reference of this structure. It consists of namespace and
	 * name of the referred structure.
	 */
	protected StructRefValue libReference = null;
	/**
	 * The list of the cached reference structures. TODO all the issues about
	 * this clients list : add structure, drop structure, replace structure,
	 * broadcase event and so on.
	 */
	protected ArrayList clientStructures = new ArrayList( );
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.api.core.IStructure#isReferencable()
	 */
	public boolean isReferencable( )
	{
		return true;
	}
	/*
	 * (non-Javadoc)