unittest/std-vector: fix for older numpy

unittest/python/test_std_vector.py

@@ -62,14 +62,14 @@ print("-----------------")
 print("l2:")
 l2_py = l2.tolist()
 vector.setZero(l2_py)
-pprint.pp(l2_py)
+pprint.pprint(l2_py)
 checkZero(l2_py)
 print("-----------------")
 
 l3_copy = copyStdVector(l3)
 print("l3_std:")
 vector.setZero(l3_copy)
-pprint.pp(list(l3_copy))
+pprint.pprint(list(l3_copy))
 checkZero(l3_copy)
 print("-----------------")