VFS: Satisfy GNATprove and No_Secondary_Stack
diff --git a/src/filo-fs-ext2.adb b/src/filo-fs-ext2.adb
index 9cd9c7a..ccc8b31 100644
--- a/src/filo-fs-ext2.adb
+++ b/src/filo-fs-ext2.adb
@@ -11,7 +11,6 @@
 with System;
 with Interfaces;
 with Interfaces.C;
-with Interfaces.C.Strings;
 
 with FILO.Blockdev;
 with FILO.FS.VFS;
@@ -947,12 +946,12 @@
       return C.C_Mount;
    end C_Mount;
 
-   function C_Open (File_Path : Strings.chars_ptr) return int
+   function C_Open (File_Path : System.Address) return int
    with
       Export,
       Convention => C,
       External_Name => "ext2fs_dir";
-   function C_Open (File_Path : Strings.chars_ptr) return int
+   function C_Open (File_Path : System.Address) return int
    with
       SPARK_Mode => Off
    is