修复默认启动app，落地页问题 －－review by 邓新飞

@@ -535,7 +535,7 @@ public class UnionServiceImpl implements IUnionService,ApplicationEventPublisher
 			String landingUrl = mktMarketingUrl.getLandingPageUrl();
 			activeUnion.info("get landing_page_url. mktMarketingUrl is {}, landingUrl is {}, invitecodeValue ={}", mktMarketingUrl, landingUrl, click.getInvite_code());
 			if(StringUtils.isNotEmpty(landingUrl) && StringUtils.isNotEmpty(click.getInvite_code())){
-				landingUrl = (String)result.replace("invitecodeValue", click.getInvite_code());
+				landingUrl = landingUrl.replace("invitecodeValue", click.getInvite_code());
 			}
 			result.put("landing_page_url", StringUtils.isEmpty(landingUrl) ? "" : mktMarketingUrl.getLandingPageUrl());
 			activeUnion.info("active union. union_type = {}, landing_page_url = {}, result = {}, idfa = {}, imei = {}", click.getUnion_type(), landingUrl, result, request.getIdfa(), request.getImei());