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/internal/ui/dialogs/DataItemBindingDialog.java
createColumnName( input, DEFAULT_ITEM_NAME );
				setTypeSelect( dataTypes[0] );
			}
			else
			{
				setName( bindingColumn.getName( ) );
				setTypeSelect( DATA_TYPE_CHOICE_SET.findChoice( bindingColumn.getDataType( ) )
						.getDisplayName( ) );
				setExpression( bindingColumn.getExpression( ) );
				setAggregateOnSelect( bindingColumn.getAggregateOn( ) );
			}
		}
		catch ( Exception e )
		{
			ExceptionHandler.handle( e );
		}
	}
	public void setTypeSelect( String typeSelect )
	{
		this.typeSelect = typeSelect;
		initDataTypes( );
	}
	public String getExpression( )
	{
		return itemExpression.getText( );
	}
	public String getAggregateOnSelect( )
	{
		return itemAggregateOn.getText( );
	}