innd/python.c empty article patch

[greg andruk]

If an article has headers, a blank line, then no body, innd will
accept it but the Python filter (if enabled) will then try to use a
buffer of length -1.  This can cause a segfault.

A fix:

--- innd/python.c.orig	Sat Dec  9 23:42:03 2000
+++ innd/python.c	Sun Dec 10 00:04:34 2000
@@ -135,10 +135,11 @@
     }
 
     /* ...then the body... */
-    if (artBody != NULL) {
-	PYheaditem[hdrnum] = PyBuffer_FromMemory(artBody, --artLen);
-	PyDict_SetItem(PYheaders, PYbodykey, PYheaditem[hdrnum++]);
-    }
+    if (artLen && artBody != NULL)
+        PYheaditem[hdrnum] = PyBuffer_FromMemory(artBody, --artLen);
+    else
+        PYheaditem[hdrnum] = Py_None;
+    PyDict_SetItem(PYheaders, PYbodykey, PYheaditem[hdrnum++]);
 
     /* ...and finally, the line count. */
     PYheaditem[hdrnum] = PyInt_FromLong((long) lines);