fix typo introduced in previous commit

playground/static/playground/js/views.js

@@ -1175,7 +1175,7 @@ window.W = window.W || {};
 
             if (sublines && sublines.length > 1) {
                 var alternative = this.model.get('alternative');
-                if (sublinesalternative && alternative.type === rangeType.exact && alternative.value === 1) {
+                if (alternative && alternative.type === rangeType.exact && alternative.value === 1) {
                     return false;
                 }