之前会传一个1900-1-1的日期，导致报错，现在改为传null

高章伟

2022-04-15 65672b84a76127496e7dcff8e99c473b35a8d234

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<apex:page id="communitiesLandingPage" controller="CommunitiesLandingController" action="{!forwardToStartPage}" title="{!$Label.site.site_login}">
</apex:page>