Bug 140542 label can't be displayed without resource file or unmatched key
Steps to reproduce: 1.New a report, add a lable with text "aaa" 2.Add a resource file for the report, set key to "key1", value to "actuate", apply the value to the label 3.Clear the resource file in Property Editor->General->Resource File (or change the key to "abc") 4.Preview the report Expected result: 1.Display label text "aaa" on preview or 2.Give a warning message to say resource file is not found or unmatched key Actual result: Nothing displays on preview
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/Module.java
* @return the location information of the module
	 */
	public String getLocation( )
	{
		assert systemId != null;
		if ( fileName == null )
			return systemId.toString( );
		return systemId + StringUtil.extractFileNameWithSuffix( fileName );
	}
	/**
	 * @param namespace
	 * @return the included library structure with the given namespace
	 */
	public IncludedLibrary findIncludedLibrary( String namespace )
	{
		List libs = getIncludedLibraries( );
		IncludedLibrary includedItem = null;
		for ( int i = 0; i < libs.size( ); i++ )
		{
			IncludedLibrary incluedLib = (IncludedLibrary) libs.get( i );
			if ( incluedLib.getNamespace( ).equalsIgnoreCase( namespace ) )
			{
				includedItem = incluedLib;
				break;
			}
		}
		return includedItem;
	}
	/**
	 * Gets the library with the given location path.