BUGFIX: If ComplexTableField::getParentRecord() can't find a record, just return null rather than erroring. (from r96555) (from r96649)
git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/branches/2.4@96775 467b73ca-7a2a-4603-9d3b-597d59a354a9