I understand the amount would be in dispute. The point to remember though is that Grifco could settle the discrepency far more efficently than trying to buy 17 million shares in the open market. I'm sure the latter would be great for current CTBG shareholders.
Grifco can take the average daily value or use the current value of CTBG (although there is room for manipulation to get that amount to the lowest amount possible by JD). However, this is what most companies do on a stock dividend/merger/acquisition etc. A fractional amount is usually paid out in cash. Since JD is the majority shareholder, he can decide on the method of settlement although he would still have to be reasonable in his approach.
All the above is academic anyways because #1 Grifco doesn't have the resources (cash) and #2 JD is a crook so he would probably run off to Mexico than to set things right for the shareholders.
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