* org-agenda.el (calendar-check-holidays): Declare function.

Thanks to Achim Gratz for spotting this.

lisp/org-agenda.el

@@ -66,6 +66,8 @@
 (declare-function calendar-julian-date-string   "cal-julian" (&optional date))
 (declare-function calendar-mayan-date-string    "cal-mayan"  (&optional date))
 (declare-function calendar-persian-date-string  "cal-persia" (&optional date))
+(declare-function calendar-check-holidays       "holidays" (date))
+
 (declare-function org-datetree-find-date-create "org-datetree"
 		  (date &optional keep-restriction))
 (declare-function org-columns-quit              "org-colview" ())