Bug 163018 An error extension will lead the report contain chart can't be opened and can not new a report.
Details: An error extension will lead the report contain chart can't open In org.eclipse.birt.report.tests.model has an error extension. When run the birt use workbenck, the report contain chart can't be opened and it can not new a report.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/metadata/ExtensionLoader.java
{
	/**
	 * Logger instance.
	 */
	private static Logger logger = Logger.getLogger( ExtensionLoader.class
			.getName( ) );
	private String extensionPointer = null;
	/**
	 * Constructor with the id of extension pointer which the extension this
	 * extension loader loads implements.
	 * 
	 * @param extensionPointer
	 *            the id of extension pointer
	 */
	ExtensionLoader( String extensionPointer )