mount: Ignore `loop' option

* utils/mount.c (do_mount): Ignore `loop' option.
---
 mount.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/utils/mount.c
+++ b/utils/mount.c
@@ -273,7 +273,8 @@ do_mount (struct fs *fs, int remount)
       {
 	ARGZ (add (&fsopts, &fsopts_len, o));
       }
-    else if (strcmp (o, "defaults") != 0)
+    else if (strcmp (o, "defaults") != 0 &&
+	     strcmp (o, "loop") != 0)
       {
 	/* Prepend `--' to the option to make a long option switch,
 	   e.g. `--ro' or `--rsize=1024'.  */