Bug 1022575 - Received SMS store (without text) on check balance. v2.0 only patch. r=julien

Mmm, probably the case you're describing is quite rare and I think it only can happen if Cost Control sends SMS and there is a big gap between "onsending" and "onsent" events (I believe Cost Control removes sent message once it receives "onsent"). In case of receiving of service SMS, Cost Control almost immediately removes it. So we don't have any alive threads\messages in the middle.