Fix 'Undefined variable: jsSet in CRM_Core_BAO_Mapping::loadSavedMapping()'

[JKingsnorth]

Overview

When editing smart group criteria built with 'Search builder':

Notice: Undefined variable: jsSet in CRM_Core_BAO_Mapping::loadSavedMapping() (line 952 of /var/aegir/platforms/alumni-staging/sites/alumni.staging.drupal.uis.cam.ac.uk/modules/contrib/civicrm/CRM/Core/BAO/Mapping.php).

Source: 5c322e1 (Ping @eileenmcnaughton

The variable forms part of the array that is returned, but it is not declared in some instances:

civicrm-core/CRM/Core/BAO/Mapping.php

Line 952 in 64aa560

return [$mappingName, $defaults, $noneArray, $jsSet];

Before

jsSet might not be defined.

After

jsSet is always defined.

[civibot]

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