fix test: passing an object into a METH_O Python function no longer stores it...

fix test: passing an object into a METH_O Python function no longer stores it in a tuple and thus no longer increases its refcount

tests/memoryview/memslice.pyx

@@ -1989,8 +1989,8 @@ def test_object_dtype_copying():
     7
     8
     9
-    3 5
     2 5
+    1 5
     """
     cdef int i