Bug 161222 Decoration label should be optional in Gantt Chart
It should not be mandatory to specify a decoration label for Gantt Charts, this can be left blank. Currently the UI and Engine enforce a data definition to be specified for it.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/internal/datafeed/ResultSetWrapper.java
}
						}
						else if ( cprt > 0 )
						{
							if ( sorting == SortOption.ASCENDING_LITERAL )
							{
								insertPoint = j + 1;
							}
						}
					}
					if ( !matched )
					{
						if ( sorting != null && insertPoint == -1 )
						{
							
							
							insertPoint = 0;
						}
						if ( insertPoint == -1
								|| insertPoint >= baseValue.size( ) )
						{
							
							
							baseValue.add( oValue );
							idx.add( new Integer( baseValue.size( ) - 1 ) );
						}
						else
						{
							
							baseValue.add( insertPoint, oValue );