minor mods

Author: manishamde

mllib/src/main/scala/org/apache/spark/mllib/tree/DecisionTree.scala

@@ -562,17 +562,16 @@ object DecisionTree extends Serializable with Logging {
           val label = arr(0)
           // Iterate over all features.
           var featureIndex = 0
+          // TODO: Multiclass modification here
           while (featureIndex < numFeatures) {
             // Find the bin index for this feature.
             val arrShift = 1 + numFeatures * nodeIndex
             val arrIndex = arrShift + featureIndex
             // Update the left or right count for one bin.
             val aggShift = 2 * numBins * numFeatures * nodeIndex
             val aggIndex = aggShift + 2 * featureIndex * numBins + arr(arrIndex).toInt * 2
-            // TODO: Multiclass modification here
             label match {
-              case 0.0 => agg(aggIndex) = agg(aggIndex) + 1
-              case 1.0 => agg(aggIndex + 1) = agg(aggIndex + 1) + 1
+              case n: Double => agg(aggIndex) = agg(aggIndex + n.toInt) + 1
             }
             featureIndex += 1
           }