Bug 175664 [Mac] Unexpected internal exception occurs when invoke expression builder
Description: There are two problems: 1. "fx" button (Click this button to invoke Expression Builder) could not be displayed correctly, nothing displayed in the button. 2. Click on the button, an unexpected internal exception occurs. Version:2.2.0.v20070205 Steps to reproduce: 1.Insert a Data item to the layout. Click "fx" button to invoke the expression builder, although on Mac "fx" button could not display correctly. Error log: Argument cannot be null Plug-in Provider: Eclipse.org Plug-in Name: BIRT Designer UI Plug-in ID: org.eclipse.birt.report.designer.ui Error Code: Error.GUIException.invokedByUnexpectedException Error Message:Argument cannot be null
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/util/UIUtil.java
/**
	 * Includes the library into within the given module.
	 * 
	 * @param moduleHandle
	 *            the handle module
	 * @param libraryPath
	 *            the full path of the library
	 * @return true if it included successfully, or false if the operation
	 *         failed.
	 */
	public static boolean includeLibrary( ModuleHandle moduleHandle,
			String libraryPath ) throws DesignFileException, SemanticException
	{
		String namespace = getLibraryNamespace( moduleHandle, libraryPath );
		if ( namespace != null )
		{
			
			if ( libraryPath.startsWith( "file" ) || new File( libraryPath ).exists( ) ) 
			{
				moduleHandle.includeLibrary( DEUtil.getRelativedPath( ReportPlugin.getDefault( )
						.getResourceFolder( ),
						libraryPath ),
						namespace );
			}
			
			else if ( libraryPath.startsWith( "bundleresource" ) ) 
			{
				try
				{
					moduleHandle.includeLibrary( new URL( libraryPath ).getPath( ),