--- Python-2.5-orig/Modules/_tkinter.c	2006-08-11 22:33:36.000000000 -0400

+++ Python-2.5/Modules/_tkinter.c	2007-10-19 01:04:42.000000000 -0400

@@ -938,7 +938,7 @@

 #if defined(Py_UNICODE_WIDE) && TCL_UTF_MAX == 3

 		Tcl_UniChar *outbuf;

 		Py_ssize_t i;

-		assert(size < size * sizeof(Tcl_UniChar));

+		assert(size == 0 || size < size * sizeof(Tcl_UniChar));

 		outbuf = (Tcl_UniChar*)ckalloc(size * sizeof(Tcl_UniChar));

 		if (!outbuf) {

 			PyErr_NoMemory();