Online membership renewal throws fatal error if membership type being checked has more than one inherited relationship type

CRM_Contribute_Form_ContributionBase->preProcess invokes CRM_Contact_BAO_Relationship::getPermissionedContacts to check for valid permissioned contacts based on passed in relationshipTypeId parameter. However, if the membership type being checked has > 1 inherited relationship types, then $membershipType->relationship_type_id will be a CTRL-A padded string of IDs. This results in a fatal error since the query is expected in INT:

One of parameters (value: 7788) is not of the type Integer