Fix minor correctness bug in test FannTestData::ScaleData.

The first output of the second pattern was accessed as if it were the
second output of the first pattern. This works because the patterns are
allocated in contiguous memory anyway, but it is technically incorrect.

Author: Nico Madysa

tests/fann_test_data.cpp

@@ -160,7 +160,7 @@ TEST_F(FannTestData, ScaleData) {
     }
 
     EXPECT_DOUBLE_EQ(-1.0, data.get_train_output(0)[0]);
-    EXPECT_DOUBLE_EQ(2.0, data.get_train_output(0)[1]);
+    EXPECT_DOUBLE_EQ(2.0, data.get_train_output(1)[0]);
 
 }