Avoid a compilation warning

* lisp/emacs-lisp/package.el: Avoid a compilation warning by declaring
the `find-library-name' function.

lisp/ChangeLog

+2014-12-18  Sam Steingold  <sds@gnu.org>
+
+	* emacs-lisp/package.el: Avoid compilation warning by declaring
+	the `find-library-name' function.
+
 2014-12-18  Martin Rudalics  <rudalics@gmx.at>
 
 	Add code for "preserving" window sizes.

lisp/emacs-lisp/package.el

@@ -559,6 +559,7 @@ correspond to previously loaded files (those returned by
     ;; Don't return nil.
     t))
 
+(declare-function find-library-name "find-func" (library))
 (defun package--list-loaded-files (dir)
   "Recursively list all files in DIR which correspond to loaded features.
 Returns the `file-name-sans-extension' of each file, relative to