Fix three accidental changes

Author: gvanrossum

Python/bytecodes.c

@@ -3176,7 +3176,7 @@ dummy_func(
                 goto error;
             }
             PyObject *arg = TOP();
-            PyObject *res = cfunc(PyCFunction_GET_SELF(callable), arg);
+            PyObject *res = _PyCFunction_TrampolineCall(cfunc, PyCFunction_GET_SELF(callable), arg);
             _Py_LeaveRecursiveCallTstate(tstate);
             assert((res != NULL) ^ (_PyErr_Occurred(tstate) != NULL));
 
@@ -3377,7 +3377,7 @@ dummy_func(
             if (_Py_EnterRecursiveCallTstate(tstate, " while calling a Python object")) {
                 goto error;
             }
-            PyObject *res = cfunc(self, arg);
+            PyObject *res = _PyCFunction_TrampolineCall(cfunc, self, arg);
             _Py_LeaveRecursiveCallTstate(tstate);
             assert((res != NULL) ^ (_PyErr_Occurred(tstate) != NULL));
             Py_DECREF(self);
@@ -3449,7 +3449,7 @@ dummy_func(
             if (_Py_EnterRecursiveCallTstate(tstate, " while calling a Python object")) {
                 goto error;
             }
-            PyObject *res = cfunc(self, NULL);
+            PyObject *res = _PyCFunction_TrampolineCall(cfunc, self, NULL);
             _Py_LeaveRecursiveCallTstate(tstate);
             assert((res != NULL) ^ (_PyErr_Occurred(tstate) != NULL));
             Py_DECREF(self);