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.NUMBER_FORMAT_PROP ) );
		style.setStringFormat( getElementProperty( handle,
				Style.STRING_FORMAT_PROP ) );
		
		style
				.setCanShrink( getElementProperty( handle,
						Style.CAN_SHRINK_PROP ) );
		style.setShowIfBlank( getElementProperty( handle,
				Style.SHOW_IF_BLANK_PROP ) );
		return style;
	}
	String getMemberProperty( StructureHandle handle, String name )
	{
		MemberHandle prop = handle.getMember( name );
		if ( prop != null )
		{
			return prop.getStringValue( );
		}
		return null;
	}
	IStyle setupStyle( StructureHandle highlight, IStyle style )
	{
		
		style.setBackgroundColor( getMemberProperty( highlight,
				HighlightRule.BACKGROUND_COLOR_MEMBER ) );