Bug 193886 NPE is thrown when preview external CSS style in ppt[1205]
engine/org.eclipse.birt.report.engine.emitter.ppt/src/org/eclipse/birt/report/engine/emitter/ppt/PPTRender.java
layoutY
								+ container.getHeight( )
								- borderBottomWidth
								/ 2,
						layoutX + container.getWidth( ),
						layoutY
								+ container.getHeight( )
								- borderBottomWidth
								/ 2,
						borderBottomWidth,
						borderBottomColor,
						style.getProperty( StyleConstants.STYLE_BORDER_BOTTOM_STYLE ),
						BorderInfo.BOTTOM_BORDER );
				borders[BorderInfo.LEFT_BORDER] = new BorderInfo( layoutX
						+ borderLeftWidth
						/ 2,
						layoutY,
						layoutX + borderLeftWidth / 2,
						layoutY + container.getHeight( ),
						borderLeftWidth,
						borderLeftColor,
						style.getProperty( StyleConstants.STYLE_BORDER_LEFT_STYLE ),
						BorderInfo.LEFT_BORDER );
				
				
				drawBorder( borders );
			}
		}
	}
	/**