Added case for 404 error on recommended endpoint.

src/mami.js/flashii.js

@@ -138,6 +138,8 @@ const Flashii = function(baseUrl) {
 
         if(status === 400)
             throw new Error('An argument contains an unsupported value.');
+        if(status === 404)
+            throw new Error('Was unable to determine a server based on the requested parameters.');
         if(status > 299)
             throw new Error(`Failed to fetch chat server list with error code ${status}.`);