warn when disabling calltips due to old PySide

IPython/frontend/qt/console/frontend_widget.py

@@ -119,10 +119,12 class FrontendWidget(HistoryConsoleWidget, BaseFrontendMixin):
 
     def __init__(self, *args, **kw):
         super(FrontendWidget, self).__init__(*args, **kw)
+        # FIXME: remove this when PySide min version is updated past 1.0.7
         # forcefully disable calltips if PySide is < 1.0.7, because they crash
         if qt.QT_API == qt.QT_API_PYSIDE:
             import PySide
             if PySide.__version_info__ < (1,0,7):
+                self.log.warn("PySide %s < 1.0.7 detected, disabling calltips" % PySide.__version__)
                 self.enable_calltips = False
 
         # FrontendWidget protected variables.