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
String curName = null;
				if ( parameter != null && parameter.getName( ) != null )
				{
					curName = parameter.getName( ) + "_" + parameter.getID( ); 
				}
				
				if ( curName != null
						&& curName.equalsIgnoreCase( configVarName ) )
				{
					paramName = parameter.getName( );
					break;
				}
			}
		}
		return paramName;
	}
	/**
	 * If miss parameter.
	 * 
	 * @return boolean
	 */
	public boolean isMissingParameter( )
	{
		boolean missingParameter = false;
		ModuleHandle model = SessionHandleAdapter.getInstance( )
				.getReportDesignHandle( );
		HashMap params = (HashMap) this.getConfigVars( );
		List parameters = model.getFlattenParameters( );
		if ( parameters != null )