Do not prompt for a todo after adding an appointment

We effectively turned the addition of an appointment into a fall through
case by deleting the break statement during refactoring. Revert this
deletion to skip the second prompt.

Regression introduced in f2dca7de3e.

Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>

src/calcurse.c

@@ -146,6 +146,7 @@ static inline void key_add_item(void)
     interact_day_item_add();
     inday = do_storage(0);
     wins_update(FLAG_CAL | FLAG_APP | FLAG_STA);
+    break;
   case TOD:
     interact_todo_add();
     if (todo_hilt() == 0 && todo_nb() == 1)