[Rev80 Bug Fix] can't learn skill, crash at startup...

[lmame]

Some people have issues with latest csv, like:
-> world server crashes at startup loading the csv,
-> impossible to learn a skill anymore, with a WARNING message in worldserver window (example for book 702):

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1. Invalid Item, Item: 702.
2. Unknown use item type: 12037
3. Invalid Item, Item: 702. - Type: 10

Here is a code change that should solve all those problems:
Worldserver/datatypes.h:
REPLACE:

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1. struct CProductList
2. {
3.     CProductData* Index[2000];
4.     vector<CProductData*> Data;
5.     CProductData* nullproduct;
6. };

BY:

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1. struct CProductList
2. {
3.     CProductData* Index[6000];
4.     vector<CProductData*> Data;
5.     CProductData* nullproduct;
6. };

This is due to the fact the prouct_data index isn't enough in osRose anymore to handle the objects.
Because the index is using the product ID and the ID stops at (in product_data.csv):

5550,12398|12092|12365|12390,1|2|1|1
5551,12398|12092|12363|12382,1|2|1|1
5552,12398|12092|12365|12382,1|2|1|1

So there was a memory overwrite that cause weird crashes.