The question can't really be answered they way you are asking it. The line of credit was closed, so that debt was presumably paid off, where did the money come from? The debt didn't just disappear into thin air. Presumably that money came from some other account.
What you are looking for in any case is the NET worth at the disolution of the marriage. My understanding is that the laws in Alberta are different than Ontario but the idea of the NET worth is the same. If you had 5 joint savings/chequing/investment accounts, and 5 joint LOC/credit cards, you will have a net asset (or debt). Close them all and you still have the same net amount left over.
The joint accounts being closed just before separation is a wise move, just be prepared to show where the money went and account for it. If the joint savings was closed and the money spent on drugs and hookers just 2 months prior to separation, be prepared for this to be brought up in court and have the possibility the judge will find that the money should be considered a marital asset even though it was already spent.