peppy crashes when title buffer fails to load

[https://me.yahoo.com/postrockrob#52e3a]

If the title buffer URL gets corrupted somehow, application startup will fail with:

Traceback (most recent call last):
  File "/opt/lib/python2.5/site-packages/wx-2.8-gtk2-unicode/wx/_core.py", line 14614, in <lambda>
    lambda event: event.callable(*event.args, **event.kw) )
  File "/data2/home/rob/src/peppy/peppy/frame.py", line 571, in titleBuffer
    self.open(wx.GetApp().classprefs.title_page)
  File "/data2/home/rob/src/peppy/peppy/frame.py", line 638, in open
    opener = FileOpener(self, *args, **kwargs)
  File "/data2/home/rob/src/peppy/peppy/fileopener.py", line 74, in __init__
    if 'mode' in self.url.query:
TypeError: argument of type 'NoneType' is not iterable

Probably can only be fixed by changing buffer load process to first create tab and then attempt to load the specified URL.

[rob]

(In [2534]) Fixed #847: added error handler to handle failure when decoding a URL

• reorganized FileOpener? to automatically call open()