Merge pull request #259 from DevFactory/release/collection-isempty-fix-1

Code Quality Improvement - Collection.isEmpty() should be used to test for emptiness

src/main/java/io/socket/client/Socket.java

@@ -325,7 +325,7 @@ public class Socket extends Emitter {
         }
 
         if (this.connected) {
-            if (args.size() == 0) return;
+            if (args.isEmpty()) return;
             String event = args.remove(0).toString();
             super.emit(event, args.toArray());
         } else {