Contacts: Better error reporting.

apps/contacts/lib/app.php

@@ -53,11 +53,12 @@ class OC_Contacts_App {
 		if( $addressbook === false || $addressbook['userid'] != OC_User::getUser()) {
 			if ($addressbook === false) {
 				OC_Log::write('contacts', 'Addressbook not found: '. $id, OC_Log::ERROR);
+				OC_JSON::error(array('data' => array( 'message' => self::$l10n->t('Addressbook not found.'))));
 			}
 			else {
 				OC_Log::write('contacts', 'Addressbook('.$id.') is not from '.OC_User::getUser(), OC_Log::ERROR);
+				OC_JSON::error(array('data' => array( 'message' => self::$l10n->t('This is not your addressbook.'))));
 			}
-			OC_JSON::error(array('data' => array( 'message' => self::$l10n->t('This is not your addressbook.')))); // Same here (as with the contact error). Could this error be improved?
 			exit();
 		}
 		return $addressbook;