move null return statement into catch block of Javascript#eval

content/completion.js

@@ -170,9 +170,11 @@ liberator.Completion = function () //{{{
                 // liberator.dump("eval(" + liberator.util.escapeString(arg) + ")");
                 return window.eval(arg);
             }
-            catch(e) {}
+            catch (e)
+            {
                 return null;
             }
+        }
 
         /* Get an element from the stack. If @n is negative,
          * count from the top of the stack, otherwise, the bottom.