Fix bug in SVM::trainAuto

modules/ml/src/svm.cpp

@@ -1787,7 +1787,7 @@ public:
                 if( !do_train( temp_train_samples, temp_train_responses ))
                     continue;
 
-                for( i = 0; i < test_sample_count; i++ )
+                for( i = 0; i < train_sample_count; i++ )
                 {
                     j = sidx[(i+start+train_sample_count) % sample_count];
                     memcpy(temp_train_samples.ptr(i), samples.ptr(j), sample_size);