consistently use Py_TYPE, Py_REFCNT, and correct initializer macros (#3563)

This no-op change makes 2.7 more consistent with 3.x to ease comparison and backports.
diff --git a/Modules/_lsprof.c b/Modules/_lsprof.c
index 049c94d..6090c7d 100644
--- a/Modules/_lsprof.c
+++ b/Modules/_lsprof.c
@@ -817,8 +817,7 @@
 ");
 
 statichere PyTypeObject PyProfiler_Type = {
-    PyObject_HEAD_INIT(NULL)
-    0,                                      /* ob_size */
+    PyVarObject_HEAD_INIT(NULL, 0)
     "_lsprof.Profiler",                     /* tp_name */
     sizeof(ProfilerObject),                 /* tp_basicsize */
     0,                                      /* tp_itemsize */