mnt: Mark dump_mnt_ns as static

Acked-by: Andrew Vagin <avagin@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

include/mount.h

@@ -14,7 +14,6 @@ extern struct fstype *find_fstype_by_name(char *fst);
 struct cr_fdset;
 struct ns_id;
 extern struct mount_info * collect_mntinfo(struct ns_id *ns);
-extern int dump_mnt_ns(struct ns_id *ns);
 extern int prepare_mnt_ns(void);
 
 extern int pivot_root(const char *new_root, const char *put_old);

mount.c

@@ -843,7 +843,7 @@ err:
 	return NULL;
 }
 
-int dump_mnt_ns(struct ns_id *ns)
+static int dump_mnt_ns(struct ns_id *ns)
 {
 	struct mount_info *pm, *pms;
 	int img_fd = -1, ret = -1;