Confirm that `json.el' and SSL are available for the new API.

* twittering-mode.el: Confirm that `json.el' and SSL are available
before calling the Twitter REST API v1.1.
(twittering-call-api-with-account): confirm that `json.el' and SSL
are available for the Twitter REST API v1.1.

ChangeLog

@@ -17,6 +17,11 @@
 	command `get-service-configuration' and add an authentication
 	header correctly.
 
+	* twittering-mode.el: Confirm that `json.el' and SSL are available
+	before calling the Twitter REST API v1.1.
+	(twittering-call-api-with-account): confirm that `json.el' and SSL
+	are available for the Twitter REST API v1.1.
+
 2013-03-04  Tadashi MATSUO  <tad@mymail.twin.jp>
 
 	* twittering-mode.el: Use the JSON format for retrieving list

twittering-mode.el

@@ -5219,11 +5219,16 @@ get-service-configuration -- Get the configuration of the server.
       (twittering-call-api-with-account-in-api1.0
        account-info-alist command args-alist additional-info))
      ((eq twittering-service-method 'twitter-api-v1.1)
-      (if (require 'json nil t)
-	  (twittering-call-api-with-account-in-api1.1
-	   account-info-alist command args-alist additional-info)
+      (cond
+       ((not (require 'json nil t))
 	(error "`json.el' is required to use the Twitter REST API v1.1")
-	nil))
+	nil)
+       ((not twittering-use-ssl)
+	(error "SSL is required to use the Twitter REST API v1.1")
+	nil)
+       (t
+	(twittering-call-api-with-account-in-api1.1
+	 account-info-alist command args-alist additional-info))))
      (t
       (error "`twittering-service-method' is an invalid service method")
       ))))