added likes

Extensions/combined/src/events.js

@@ -55,7 +55,7 @@ function likeClicked() {
       storedData.previousState = LIKED_STATE;
     } else if ((storedData.previousState = LIKED_STATE)) {
       sendVote(0);
-      storedData.likes--;
+      if (storedData.likes > 0) storedData.likes--;
       createRateBar(storedData.likes, storedData.dislikes);
       storedData.previousState = NEUTRAL_STATE;
     }
@@ -78,7 +78,7 @@ function dislikeClicked() {
       storedData.previousState = NEUTRAL_STATE;
     } else if (storedData.previousState === LIKED_STATE) {
       sendVote(-1);
-      storedData.likes--;
+      if (storedData.likes > 0) storedData.likes--;
       storedData.dislikes++;
       setDislikes(numberFormat(storedData.dislikes));
       createRateBar(storedData.likes, storedData.dislikes);