Bug 194371 Use page emitter framework to implement ppt emitter.
In order to keep consistent with pdf and postscript, ppt need to use page emitter framework.
engine/org.eclipse.birt.report.engine.emitter.ppt/src/org/eclipse/birt/report/engine/emitter/ppt/PPTEmitter.java
try
			{
				render.endPage( );
			}
			catch ( IOException e )
			{
				e.printStackTrace( );
			}
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.emitter.IContentEmitter#endRow(org.eclipse.birt.report.engine.content.IRowContent)
	 */
	public void endRow( IRowContent row )
	{
		return;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.emitter.IContentEmitter#endTable(org.eclipse.birt.report.engine.content.ITableContent)
	 */
	public void endTable( ITableContent table )
	{
		return;
	}
	/*
	 * (non-Javadoc)