Fixed bug: Crash in Kruskal Wallis test

Prism Windows and Mac will sometimes (not always) crash when running the Kruskal-Wallis test when the there are more than seven columns and fewer than 23 values in all columns. This is rarely seen because few people have more than seven columns and those that do usually have plenty of data in each column so the total number of points is much greater than 23. 

Fixed in Prism P7.04 and P7.0d.