add back nicer formatting

Author: Shyam Seshadri

src/widgets.js

@@ -87,7 +87,7 @@ function valueAccessor(scope, element) {
           validateScope = extend(new (extend(function(){}, {prototype:scope}))(), {$element:element});
       error = required && !value ?
               'Required' :
-              value ? validator(validateScope, value) : null;
+              (value ? validator(validateScope, value) : null);
       elementError(element, NG_VALIDATION_ERROR, error);
       lastError = error;
       if (error) {