org-bbdb: Declare functions, silence byte compiler

* org-bbdb.el (bbdb-record-get-field, bbdb-search-name)
(bbdb-search-organization): Declare functions to silence byte
compiler.

lisp/org-bbdb.el

@@ -112,6 +112,9 @@
           (&optional dont-check-disk already-in-db-buffer))
 (declare-function bbdb-split "ext:bbdb" (string separators))
 (declare-function bbdb-string-trim "ext:bbdb" (string))
+(declare-function bbdb-record-get-field "ext:bbdb" (record field))
+(declare-function bbdb-search-name "ext:bbdb-com" (regexp &optional layout))
+(declare-function bbdb-search-organization "ext:bbdb-com" (regexp &optional layout))
 
 (declare-function calendar-leap-year-p "calendar" (year))
 (declare-function diary-ordinal-suffix "diary-lib" (n))