Always init module paths

The previous cleanup patch broke module loading in the the REPL by
not initializing require.paths.

src/node.js

@@ -388,7 +388,6 @@
 
     // bootstrap main module.
     Module.runMain = function() {
-      Module._initPaths();
       // Load the main module--the command line argument.
       process.mainModule = new Module('.');
       process.mainModule.load(process.argv[1]);
@@ -414,6 +413,8 @@
       return Module._load('repl', '.');
     };
 
+    Module._initPaths();
+
     // backwards compatibility
     Module.Module = Module;