Bug 153412 Change parameter type will cause preview fail
Description: Change parameter type will cause preview fail Steps to reproduce: 1. New a report paramter, string, text-box, default value is abc. 2. Drag the parameter to Layout and preview. 3. Change the parameter's type to integer, list-box, add a value 1 4. Preview Expected result: No errors. Actual result: The value "abc" is invalid with the type "integer".
UI/org.eclipse.birt.report.designer.ui.preview/src/org/eclipse/birt/report/designer/ui/preview/editors/ReportPreviewFormPage.java
{
						ConfigVariableHandle configVar = (ConfigVariableHandle) it.next( );
						if ( configVar != null && configVar.getName( ) != null )
						{
							
							String paramName = getParameterName( configVar.getName( ) );
							if ( paramName != null && paramName.length( ) > 0 )
							{
								configVars.put( paramName, configVar.getValue( ) );
							}
						}
					}
					handle.close( );
				}
			}
		}
		catch ( DesignFileException e )
		{
			e.printStackTrace( );
			
			try
			{
				if ( handle != null )
				{
					handle.close( );
				}
			}
			catch ( Exception e1 )
			{
				e1.printStackTrace( );