Fix error handling for non-valid avatar URL

packages/rocketchat-lib/server/functions/setUserAvatar.js

@@ -10,7 +10,7 @@ RocketChat.setUserAvatar = function(user, dataURI, contentType, service) {
 		try {
 			result = HTTP.get(dataURI, { npmRequestOptions: {encoding: 'binary'} });
 		} catch (error) {
-			if (error.response.statusCode !== 404) {
+			if (!error.response || error.response.statusCode !== 404) {
 				console.log(`Error while handling the setting of the avatar from a url (${ dataURI }) for ${ user.username }:`, error);
 				throw new Meteor.Error('error-avatar-url-handling', `Error while handling avatar setting from a URL (${ dataURI }) for ${ user.username }`, { function: 'RocketChat.setUserAvatar', url: dataURI, username: user.username });
 			}