Test case for #494, function binding.

tests/bugs.txt

@@ -12,6 +12,7 @@ compile.cpp_operators
 cpp_templated_ctypedef
 cpp_structs
 with_statement_module_level_T536
+function_as_method_T494
 
 # CPython regression tests that don't current work:
 pyregr.test_threadsignals

tests/run/function_as_method_T494.pyx

+__doc__ = """
+    >>> A.foo = foo
+    >>> print A().foo()
+    
+"""
+
+class A:
+    pass
+
+def foo(self):
+    return self is not None
+
+