Second attempt to fix init_io readline test.

IPython/core/interactiveshell.py

@@ -426,8 +426,7 b' class InteractiveShell(Configurable, Magic):'
 
     def init_io(self):
         import IPython.utils.io
-        if sys.platform == 'win32' and readline.have_readline and \
-            self.readline_use:
+        if sys.platform == 'win32' and self.has_readline:
             Term = IPython.utils.io.IOTerm(
                 cout=readline._outputfile,cerr=readline._outputfile
             )