Move deref to below the error when checking for laststring.

Move deref to below the error when checking for laststring.

This is so it counteracts PyTuple_SET_ITEM.

Author: LumioseSil

Objects/templateobject.c

@@ -148,13 +148,13 @@ template_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
             if (last_was_str) {
                 PyObject *laststring = PyTuple_GET_ITEM(strings, stringsidx - 1);
                 PyObject *concat = PyUnicode_Concat(laststring, item);
-                Py_DECREF(laststring);
                 if (!concat) {
                     Py_DECREF(strings);
                     Py_DECREF(interpolations);
                     return NULL;
                 }
                 PyTuple_SET_ITEM(strings, stringsidx - 1, concat);
+                Py_DECREF(laststring);
             }
             else {
                 PyTuple_SET_ITEM(strings, stringsidx++, Py_NewRef(item));