Allow to call `org-show-todo-tree' with an argument

* lisp/org.el (org-sparse-tree): Allow to call `org-show-todo-tree'
  with an argument.
* doc/orgcard.tex: Fix keybindings about `org-show-todo-tree'.

doc/orgcard.tex

@@ -484,9 +484,9 @@ after  ``{\tt :}'', and dictionary words elsewhere.
 \metax{select next/previous state}{S-LEFT/RIGHT}
 \metax{select next/previous set}{C-S-LEFT/RIGHT}
 \key{toggle ORDERED property}{C-c C-x o}
-\key{view TODO items in a sparse tree}{C-c C-v}
-\key{view 3rd TODO keyword's sparse tree}{C-3 C-c C-v}
-
+\key{view TODO items in a sparse tree}{C-c / t}
+\key{view 3rd TODO keyword's sparse tree}{C-3 C-c / t}
+p
 \key{set the priority of the current item}{C-c , [ABC]}
 \key{remove priority cookie from current item}{C-c , SPC}
 \key{raise/lower priority of current item}{S-UP/DOWN\notetwo}

lisp/org.el

@@ -12668,7 +12668,7 @@ D      Show deadlines and scheduled items between a date range."
      ((equal ans ?D)
       (call-interactively 'org-check-dates-range))
      ((equal ans ?t)
-      (org-show-todo-tree nil))
+      (call-interactively 'org-show-todo-tree))
      ((equal ans ?T)
       (org-show-todo-tree '(4)))
      ((member ans '(?T ?m))