Correction in doReproduction method. Use only parents elements for reproduction

src/main/java/be/cylab/java/wowa/training/Trainer.java

@@ -236,14 +236,15 @@ public class Trainer {
     final List<SolutionDistance> doReproduction(
             final List<SolutionDistance> solutions) {
 
+        int original_solution_size = solutions.size();
         int nbr_weights = solutions.get(0).getWeightsP().length;
 
         //we add children to the current list of solutions
         while (solutions.size() < this.parameters.getPopulationSize()) {
-            int dad = Utils.randomInteger(0, solutions.size() - 1);
+            int dad = Utils.randomInteger(0, original_solution_size - 1);
             int mom;
             do {
-                mom = Utils.randomInteger(0, solutions.size() - 1);
+                mom = Utils.randomInteger(0, original_solution_size - 1);
             } while (dad == mom);
 
             int cut_position = Utils.randomInteger(0, nbr_weights - 1);