Bug 121687 Exception throws when export data in table which inside a grid cell.
Description: Exception throws when export data in table which inside a grid cell. Steps to reproduce: 1. insert a grid. 2. insert one table to one grid cell. 3. insert another table to the other grid cell. 4. export data in two tables. Expected result: Data are exported. Actual result: Exception in: ReportEngineService.getMetaData( )
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/parser/EngineIRVisitor.java
style.setNumberAlign( getMemberProperty( highlight,
				HighlightRule.NUMBER_ALIGN_MEMBER ) );
		style.setDateFormat( getMemberProperty( highlight,
				HighlightRule.DATE_TIME_FORMAT_MEMBER ) );
		style.setNumberFormat( getMemberProperty( highlight,
				HighlightRule.NUMBER_FORMAT_MEMBER ) );
		style.setStringFormat( getMemberProperty( highlight,
				HighlightRule.STRING_FORMAT_MEMBER ) );
		
		
		
		
		
		return style;
	}
	protected DimensionType createDimension( DimensionHandle handle )
	{
		if ( handle == null || !handle.isSet( ) )
		{
			return null;
		}
		
		if ( handle.isKeyword( ) )
		{