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/import.c b/Python/import.c
index c2f42e9..21dcbd4 100644
--- a/Python/import.c
+++ b/Python/import.c
@@ -74,10 +74,11 @@
 		      3040 (added signature annotations)
 		      3050 (print becomes a function)
 		      3060 (PEP 3115 metaclass syntax)
-          3070 (PEP 3109 raise changes)
+		      3070 (PEP 3109 raise changes)
+		      3080 (PEP 3137 make __file__ and __name__ unicode)
 .
 */
-#define MAGIC (3070 | ((long)'\r'<<16) | ((long)'\n'<<24))
+#define MAGIC (3080 | ((long)'\r'<<16) | ((long)'\n'<<24))
 
 /* Magic word as global; note that _PyImport_Init() can change the
    value of this global to accommodate for alterations of how the
@@ -652,7 +653,7 @@
 	/* Remember the filename as the __file__ attribute */
 	v = NULL;
 	if (pathname != NULL) {
-		v = PyString_FromString(pathname);
+		v = PyUnicode_DecodeFSDefault(pathname);
 		if (v == NULL)
 			PyErr_Clear();
 	}
@@ -983,7 +984,7 @@
 		PySys_WriteStderr("import %s # directory %s\n",
 			name, pathname);
 	d = PyModule_GetDict(m);
-	file = PyString_FromString(pathname);
+	file = PyUnicode_DecodeFSDefault(pathname);
 	if (file == NULL)
 		goto error;
 	path = Py_BuildValue("[O]", file);