create_inputhook_qt4 wants an InputHookManager object as its first

argument, not an InputHookBase.  However, we get away with supplying
the wrong object until someone hits ctrl-c.  Passing the right object
makes graceful ctrl-c event loop integration work properly, rather than
causing IPython to exit.  This seems like a straightforward fix, but I
may be missing something.

IPython/lib/inputhook.py

@@ -363,7 +363,7 b' class Qt4InputHook(InputHookBase):'
             app = QtGui.QApplication(sys.argv)
         """
         from IPython.lib.inputhookqt4 import create_inputhook_qt4
-        app, inputhook_qt4 = create_inputhook_qt4(self, app)
+        app, inputhook_qt4 = create_inputhook_qt4(self.manager, app)
         self.manager.set_inputhook(inputhook_qt4)
         if _use_appnope():
             from appnope import nope