Merge pull request scikit-learn#5802 from alvarouc/master

[MRG+1] Voting Classifier: predictions are float but np.bincount can only be used on integers

sklearn/ensemble/voting_classifier.py

@@ -150,7 +150,7 @@ def predict(self, X):
                                       np.argmax(np.bincount(x,
                                                 weights=self.weights)),
                                       axis=1,
-                                      arr=predictions)
+                                      arr=predictions.astype('int'))
 
         maj = self.le_.inverse_transform(maj)