load lesslib when required

plugins/c9.ide.ui/ui.js

@@ -9,8 +9,6 @@ define(function(require, module, exports) {
         var settings;
 
         var packed = require("text!./style.less").length === 0;
-        var less = require("./lib_less1.5");
-        if (less) less.async = true;
         var packedThemes = packed || options.packedThemes !== false;
 
         /***** Initialization *****/
@@ -167,8 +165,9 @@ define(function(require, module, exports) {
                     throw new Error("Can't add dynamic less library in packed mode!");
                 if (packedThemes) return;
             }
-                
             // use dynamic require because we don't want this in the packed version
+            require(["./lib_less1.5"], function(less) {
+                if (less) less.async = true;
                 var parser = new less.Parser({
                     filename: filename
                 });
@@ -190,6 +189,7 @@ define(function(require, module, exports) {
                     }));
                     callback(null, style);
                 });
+            });
         }
         
         function insertCss(css, staticPrefix, plugin) {