FS.FILO.VFS: Move `Convention => C` to spec
diff --git a/src/fs-filo-vfs.ads b/src/fs-filo-vfs.ads
index 2b6dd52..7e756d7 100644
--- a/src/fs-filo-vfs.ads
+++ b/src/fs-filo-vfs.ads
@@ -47,7 +47,10 @@
       Pre => Is_Open (State),
       Post => Is_Open (State);
 
-package FS.FILO.VFS is
+package FS.FILO.VFS
+with
+   Convention => C
+is
 
    function C_Mount return int;