org.el (org-get-wdays): Handle matching a lead time specified in hours

* org.el (org-get-wdays): Handle matching a lead time specified in
hours.

TINYCHANGE

A lead time in hours is matched but will erroneously return nil.

lisp/org.el

@@ -15921,7 +15921,8 @@ Don't touch the rest."
     (floor (* (string-to-number (match-string 1 ts))
 	      (cdr (assoc (match-string 2 ts)
 			  '(("d" . 1)    ("w" . 7)
-			    ("m" . 30.4) ("y" . 365.25)))))))
+			    ("m" . 30.4) ("y" . 365.25)
+			    ("h" . 0.041667)))))))
    ;; go for the default.
    (t org-deadline-warning-days)))