don't check json if reddit doesn't exist

bot.js

@@ -186,6 +186,7 @@ function imgurRequest(subreddit, page_max) {
 // Abstracted Reddit Json media grab.
 function handleRedditJson(data) {
     let json = data.json();
+    if(json.data.children) {
         for (let i = 0; i < json.data.children.length; i++) {
             let rand = getRandomInt(0, json.data.children.length - 1);
 
@@ -193,6 +194,7 @@ function handleRedditJson(data) {
                 return json.data.children[rand].data.url;
             }
         }
+    }
     // What if we don't find anything i.e. r/dogs but its valid subreddit.
     return "";
 }