Add a comment explaining the return value of PyOS_CheckStack().
diff --git a/Python/pythonrun.c b/Python/pythonrun.c
index 8f7fc0c..48a033f 100644
--- a/Python/pythonrun.c
+++ b/Python/pythonrun.c
@@ -903,7 +903,7 @@
PyCodeObject *co;
PyObject *v;
long magic;
- long PyImport_GetMagicNumber();
+ long PyImport_GetMagicNumber(void);
magic = PyMarshal_ReadLongFromFile(fp);
if (magic != PyImport_GetMagicNumber()) {
@@ -1201,6 +1201,9 @@
#include <malloc.h>
#include <excpt.h>
+/*
+ * Return non-zero when we run out of memory on the stack; zero otherwise.
+ */
int
PyOS_CheckStack()
{