elementary: fix buffer overflow in efl/calendar widget

I missed this one in the previous part name refactor, where the efl
namespace was added.
Differential Revision: https://phab.enlightenment.org/D6498

src/lib/elementary/efl_ui_calendar.c

@@ -225,7 +225,7 @@ static void
 _access_calendar_item_register(Evas_Object *obj)
 {
    unsigned int maxdays, i;
-   char day_s[13], pname[14];
+   char day_s[13], pname[18];
    unsigned day = 0;
    Evas_Object *ao;