Add forgotten utility code dependency.

Cython/Utility/Exceptions.c

@@ -483,6 +483,7 @@ static CYTHON_INLINE void __Pyx__ExceptionReset(PyThreadState *tstate, PyObject
 #endif
 
 /////////////// SaveResetException ///////////////
+//@requires: GetTopmostException
 
 #if CYTHON_FAST_THREAD_STATE
 static CYTHON_INLINE void __Pyx__ExceptionSave(PyThreadState *tstate, PyObject **type, PyObject **value, PyObject **tb) {