[O] [bug] org-agenda-goto-date in month view fails

[Eric S Fraga]

Hello,

when jumping to a new data using 'j' (org-agenda-goto-date), an error
occurs if the current view is "month":

Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil)
  calendar-gregorian-from-absolute(nil)
  org-agenda-span-to-ndays(month)
  org-agenda-goto-date(nil)
  call-interactively(org-agenda-goto-date nil nil)
  command-execute(org-agenda-goto-date)

Week and day views work just fine.  This is with org up to date a few
minutes ago.

Thanks,
eric

-- 
: Eric S Fraga, GnuPG: 0xC89193D8FFFCF67D
: in Emacs 24.3.50.1 and Org release_8.0-pre-326-g1af215