Bug 155365 Can not set data type to "date time" when editing "Data Item"
Description: Can not set data type to "date time" when editing "Data Item" Steps to reproduce: 1. Insert a data item to the layout 2. Name it and set the expression to "a = new Date()" 3. Select the data type to date time 4. Press ok Actual result: An Birt Exception is thrown out. Expected result: No NPE thrown out
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ColumnBindingDialog.java
table.addKeyListener( new KeyAdapter( ) {
			public void keyPressed( KeyEvent e )
			{
				if ( e.keyCode == SWT.DEL )
				{
					int itemCount = table.getItemCount( );
					if ( selectIndex == itemCount )
					{
						return;
					}
					if ( selectIndex == itemCount - 1 )
					{
						selectIndex--;
					}
					try
					{