Fix bug where we used int instead of double to calculate the regression error.

Author: johann-petrak

src/gate/plugin/learningframework/engines/EngineLibSVM.java

@@ -440,8 +440,8 @@ public EvaluationResult evaluate(String algorithmParameters,
         double target[] = new double[svmprob.l];
 
         libsvm.svm.svm_cross_validation(svmprob, svmparms, numberOfFolds, target);
-        int sumSquared = 0;
-        int sumAbsolute = 0;
+        double sumSquared = 0;
+        double sumAbsolute = 0;
         int nTotal = 0;
         for(int i=0; i<target.length; i++) {
           double diff = target[i] - svmprob.y[i];