Added the const qualifier for char* argument of Py_EnterRecursiveCall().
diff --git a/Python/ceval.c b/Python/ceval.c
index 115d278..fa9e7e0 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -615,7 +615,7 @@
    to guarantee that _Py_CheckRecursiveCall() is regularly called.
    Without USE_STACKCHECK, there is no need for this. */
 int
-_Py_CheckRecursiveCall(char *where)
+_Py_CheckRecursiveCall(const char *where)
 {
     PyThreadState *tstate = PyThreadState_GET();