Manage Event: avoid E_NOTICE in smarty

[mlutfy]

Overview

To reproduce:

• Display e-notices
• Create a new Event
• Go to Manage Event > Online Registration

When using a dev environment that displays notices, or throws exceptions, it will fail to load the page.

Technical Details

The associated Smarty tpl has "if" statements in other places to check against empty values, but it throws a notice on this:

    var profileBottomCount = Number({/literal}{$profilePostMultiple|@count}{literal});
    var profileBottomCountAdd = Number({/literal}{$profilePostMultipleAdd|@count}{literal});

whereas in other places, the code does this:

      {if $profilePostMultipleAdd}
        {foreach from=$profilePostMultipleAdd item=profilePostIdA key=profilePostNumA name=profilePostIdAName}

I figured it was preferable to assign upstream, rather than add "ifs" in smarty.

[civibot]

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[demeritcowboy]

r-run: Can reproduce and fix works.

This makes me realize that in the loudnotices extension it should at least let through logging of smarty issues. I ended up just skipping them because there's so many and almost every page throws an exception - on this page you don't even get this far because it would error out at pageTitle.