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
target.addClientStructure( this );
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.core.Structure#validate(org.eclipse.birt.report.model.core.Module,
	 *      org.eclipse.birt.report.model.core.DesignElement)
	 */
	public List validate( Module module, DesignElement element )
	{
		List errors = new ArrayList( );
		
		StructRefValue ref = (StructRefValue) getLocalProperty( module,
				LIB_REFERENCE_MEMBER );
		if ( ref != null && !ref.isResolved( ) )
		{
			errors.add( new SemanticError( element, new String[]{
					getDefn( ).getName( ), getReferencableProperty( ),
					libReference.getQualifiedReference( )},
					SemanticError.DESIGN_EXCEPTION_INVALID_LIBRARY_REFERENCE ) );
			return errors;
		}
		return errors;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see java.lang.Object#clone()
	 */