Patch #1272, by Christian Heimes and Alexandre Vassalotti.
Changes to make __file__ a proper Unicode object, using the default
filesystem encoding.
This is a bit tricky because the default filesystem encoding isn't
set by the time we import the first modules; at that point we fudge
things a bit.  This is okay since __file__ isn't really used much
except for error reporting.
Tested on OSX and Linux only so far.
diff --git a/Python/compile.c b/Python/compile.c
index d20da0a..93087db 100644
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -1247,7 +1247,7 @@
 				PyObject_REPR(name), 
 				PyString_AS_STRING(c->u->u_name), 
 				reftype, arg,
-				PyString_AS_STRING(co->co_name),
+				PyUnicode_AsString(co->co_name),
 				PyObject_REPR(co->co_freevars));
 			Py_FatalError("compiler_make_closure()");
 		}
@@ -4001,7 +4001,7 @@
 	freevars = dict_keys_inorder(c->u->u_freevars, PyTuple_Size(cellvars));
 	if (!freevars)
 	    goto error;
-	filename = PyString_FromString(c->c_filename);
+	filename = PyUnicode_DecodeFSDefault(c->c_filename);
 	if (!filename)
 		goto error;