[windows] more path

Author: tstack

src/base/fs_util.cc

@@ -268,11 +268,11 @@ path_transcoder::to_native(std::string arg)
 
     if (arg[0] == '/') {
         arg.erase(0, 1);
+        arg.insert(1, ":");
     }
     if (this->pt_root_name_capitalized.value()) {
         arg[0] = toupper(arg[0]);
     }
-    arg.insert(1, ":");
     std::replace(arg.begin(), arg.end(), '/', '\\');
 
     return arg;