For PEP3137: Adds missing methods to the mutable PyBytes object (soon
to be called a buffer).  Shares code with stringobject when possible.
Adds unit tests with common code that should be usable to test the PEPs
mutable buffer() and immutable bytes() types.

 http://bugs.python.org/issue1261
diff --git a/Objects/stringlib/unicodedefs.h b/Objects/stringlib/unicodedefs.h
index 25c1d4f..fa6140f 100644
--- a/Objects/stringlib/unicodedefs.h
+++ b/Objects/stringlib/unicodedefs.h
@@ -22,6 +22,8 @@
 #define STRINGLIB_CHECK          PyUnicode_Check
 #define STRINGLIB_TOSTR          PyObject_Unicode
 
+#define STRINGLIB_WANT_CONTAINS_OBJ 1
+
 /* STRINGLIB_CMP was defined as:
 
 Py_LOCAL_INLINE(int)