Adding lastCallFailed method to AbstractApi to tell whether or not the last API call failed.

Author: nerdo

lib/Redmine/Api/AbstractApi.php

@@ -26,6 +26,16 @@ public function __construct(Client $client)
         $this->client = $client;
     }
 
+    /**
+     * Returns whether or not the last api call failed.
+     *
+     * @return bool
+     */
+    public function lastCallFailed() {
+        $clientResponseCode = $this->client->getResponseCode();
+        return $clientResponseCode < 200 || $clientResponseCode >= 400;
+    }
+
     /**
      * {@inheritDoc}
      */