Bug 182673 No default value error message prompts incorrectly
Steps to reproduce: 1. New a report parameter; 2. Choose control type as Combo; 3. Choose parameter as dynamic type; Expected result: As the isRequired is false by default, parameter's default value can be null value. There should be no error message about no default value prompt. Actual result; Error messages prompts
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ParameterDialog.java
}
			if ( needSort.isEnabled( ) )
			{
				if ( dirtyProperties.containsKey( CHECKBOX_SORT ) )
				{
					inputParameter.setFixedOrder( !getProperty( CHECKBOX_SORT ) );
				}
			}
			else
			{
				inputParameter.setProperty( ScalarParameterHandle.FIXED_ORDER_PROP,
						null );
			}
			
			if ( !isStatic( ) && !StringUtil.isBlank( listLimit.getText( ) ) )
			{
				try
				{
					inputParameter.setListlimit( Integer.parseInt( listLimit.getText( ) ) );
				}
				catch ( NumberFormatException ex )
				{
					ExceptionHandler.openErrorMessageBox( ERROR_TITLE_INVALID_LIST_LIMIT,
							MessageFormat.format( ERROR_MSG_INVALID_LIST_LIMIT,
									new Object[]{
										Integer.toString( Integer.MAX_VALUE )
									} ) );
				}
			}
			else