Index: Modules/sha1module.c
===================================================================
--- Modules/sha1module.c	(revision 65688)
+++ Modules/sha1module.c	(working copy)
@@ -488,6 +488,7 @@
     static char *kwlist[] = {"string", NULL};
     SHA1object *new;
     Py_buffer buf;
+    buf.buf = NULL;
 
     if (!PyArg_ParseTupleAndKeywords(args, kwdict, "|s*:new", kwlist,
                                      &buf)) {
@@ -505,7 +506,7 @@
     }
     if (buf.buf) {
         sha1_process(&new->hash_state, buf.buf, buf.len);
-	PyBuffer_Release(&buf);
+        PyBuffer_Release(&buf);
     }
 
     return (PyObject *)new;
Index: Modules/md5module.c
===================================================================
--- Modules/md5module.c	(revision 65688)
+++ Modules/md5module.c	(working copy)
@@ -530,7 +530,7 @@
     }
     if (buf.buf) {
         md5_process(&new->hash_state, buf.buf, buf.len);
-	PyBuffer_Release(&buf);
+        PyBuffer_Release(&buf);
     }
 
     return (PyObject *)new;