Merge pull request #3170 from thorn0/patch-1

`inline` and `less` imports of the same name = race condition

Author: seven-phases-max

lib/less/import-manager.js

@@ -51,7 +51,10 @@ module.exports = function(environment) {
                 callback(null, {rules:[]}, false, null);
             }
             else {
-                if (!importManager.files[fullPath]) {
+                // Inline imports aren't cached here.
+                // If we start to cache them, please make sure they won't conflict with non-inline imports of the
+                // same name as they used to do before this comment and the condition below have been added.
+                if (!importManager.files[fullPath] && !importOptions.inline) {
                     importManager.files[fullPath] = { root: root, options: importOptions };
                 } 
                 if (e && !importManager.error) { importManager.error = e; }