GFS2: Fix error code

We need this one-liner to signal the mount helper of the 'insufficient journals' condition.
Signed-off-by: Abhijith Das <adas@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

fs/gfs2/ops_fstype.c

@@ -725,7 +725,7 @@ static int init_journal(struct gfs2_sbd *sdp, int undo)
 		goto fail;
 	}
 
-	error = -EINVAL;
+	error = -EUSERS;
 	if (!gfs2_jindex_size(sdp)) {
 		fs_err(sdp, "no journals!\n");
 		goto fail_jindex;