NullPointerException if classIndex is 0 ( = first Attribute )

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Create Instances with first Attribute being the class
2. build a FastRandomForest with these Instances


What version of the product are you using? On what operating system?
0.99 
0.98

Solution
In FastRandomTree replace data.sortedIndices[0].length with 
data.sortedIndices[attIndicesWindow[0]].length

In version 0.99 only one line has to be changed when calling buildTree() in the 
run() method.

In version 0.98 several occurences have to be replaced withing the buildTree 
function.

Original issue reported on code.google.com by [email protected] on 6 May 2014 at 1:18