CRM-21239 Switch default in CRM_Utils_Request::retrieve from 0 to NUL…
Created by: seamuslee001
…L now that retrieve function doesn't filter out non false defaults
ping @JoeMurray @Edzelopez @monishdeb
Created by: seamuslee001
…L now that retrieve function doesn't filter out non false defaults
ping @JoeMurray @Edzelopez @monishdeb