This reverts r63675 based on the discussion in this thread:

 http://mail.python.org/pipermail/python-dev/2008-June/079988.html

Python 2.6 should stick with PyString_* in its codebase.  The PyBytes_* names
in the spirit of 3.0 are available via a #define only.  See the email thread.
diff --git a/PC/winsound.c b/PC/winsound.c
index 4caadb3..e6ff226 100644
--- a/PC/winsound.c
+++ b/PC/winsound.c
@@ -151,7 +151,7 @@
 static void
 add_define(PyObject *dict, const char *key, long value)
 {
-    PyObject *k=PyBytes_FromString(key);
+    PyObject *k=PyString_FromString(key);
     PyObject *v=PyLong_FromLong(value);
     if(v&&k)
     {