Changed to use 'U' argument to PyArg_ParseTuple, instead of manually checking for unicode objects.
diff --git a/Objects/stringlib/unicodedefs.h b/Objects/stringlib/unicodedefs.h
index a50a3f2..25c1d4f 100644
--- a/Objects/stringlib/unicodedefs.h
+++ b/Objects/stringlib/unicodedefs.h
@@ -8,6 +8,7 @@
#define STRINGLIB_CHAR Py_UNICODE
#define STRINGLIB_TYPE_NAME "unicode"
+#define STRINGLIB_PARSE_CODE "U"
#define STRINGLIB_EMPTY unicode_empty
#define STRINGLIB_ISDECIMAL Py_UNICODE_ISDECIMAL
#define STRINGLIB_TODECIMAL Py_UNICODE_TODECIMAL