Amend template test (new invocation)

nogil_test/cypclass_test_templates.pyx

@@ -13,4 +13,6 @@ cdef cypclass SomeMemory[T, U]:
 
 cpdef bag():
   cdef SomeMemory[int, double] o = SomeMemory[int, double](1, 2.3)
-  return str(o.a) + '\n' + str(o.b) + '\n' + str(o.first()) + '\n' + str(o.second())
\ No newline at end of file
+  cdef SomeMemory[int, int] b = new SomeMemory[int, int]()
+  del b
+  return str(o.a) + '\n' + str(o.b) + '\n' + str(o.first()) + '\n' + str(o.second())