Ensure null check on youtube dislikes to prevent 0 displaying

Extensions/UserScript/Return Youtube Dislike.user.js

@@ -127,7 +127,7 @@ function setState() {
       if (result) {
         cLog("response from youtube:");
         cLog(JSON.stringify(result));
-        if (result.likes || result.dislikes) {
+        if (result.likes && result.dislikes) {
           const formattedDislike = numberFormat(result.dislikes);
           setDislikes(formattedDislike);
           createRateBar(result.likes, result.dislikes);

Extensions/chrome/return-youtube-dislike.script.js

@@ -75,7 +75,7 @@
           cLog("response from youtube:");
           cLog(JSON.stringify(response));
           try {
-            if (response.likes || response.dislikes) {
+            if (response.likes && response.dislikes) {
               const formattedDislike = numberFormat(response.dislikes);
               setDislikes(formattedDislike);
               createRateBar(response.likes, response.dislikes);

Extensions/firefox/return-youtube-dislike.script.js

@@ -71,7 +71,7 @@ function setState() {
         cLog("response from youtube:");
         cLog(JSON.stringify(response));
         try {
-          if (response.likes || response.dislikes) {
+          if (response.likes && response.dislikes) {
             const formattedDislike = numberFormat(response.dislikes);
             setDislikes(formattedDislike);
             createRateBar(response.likes, response.dislikes);