Bug 191168 [Regression]Exception occurs when resize masterpage in library
Description: Exception occurs when resize masterpage in library. Build number:2.2.0.v20070606-0630 Regression bug:187443 Steps to reproduce: 1. New a library. 2. Go to Master Page, resize the master page using the ruler. Expected result: 1. Layout works correctly. 2. No exception is thrown out. Error log: An unexpected internal exception occurred.Please see log for detail. Plug-in Provider:Eclipse.org Plug-in Name:BIRT Designer UI Plug-in ID:org.eclipse.birt.report.designer.ui Version:2.2.0.v20070606-0630 Error Code:Error.GUIException.invokedByUnexpectedException Error Message:org.eclipse.birt.report.designer.internal.lib.lalyout.LibraryReportDesignLayout
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/Module.java
/**
	 * Returns all libaries this module contains.
	 * 
	 * @return list of libraries.
	 */
	public List getAllLibraries( )
	{
		return getLibraries( IAccessControl.ARBITARY_LEVEL );
	}
	/**
	 * Returns included libaries within the given depth.
	 * 
	 * @param level
	 *            the given depth
	 * @return list of libraries.
	 * 
	 * @see IModuleNameScope
	 */
	public List getLibraries( int level )
	{
		if ( level <= IAccessControl.NATIVE_LEVEL || libraries == null )
			return Collections.EMPTY_LIST;
		int newLevel = level - 1;
		
		if ( newLevel == IAccessControl.NATIVE_LEVEL )
			return Collections.unmodifiableList( libraries );
		List allLibraries = new ArrayList( libraries );
		Iterator iter = new ArrayList( allLibraries ).iterator( );
		while ( iter.hasNext( ) )
		{