vfs: show_vfsmnt: remove redundant initialization of error code

As err variable is now always checked right after the first assignment,
its initialization is redundant and could be safely removed.

Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/proc_namespace.c b/fs/proc_namespace.c
index 8ebd9a3..1d984b5 100644
--- a/fs/proc_namespace.c
+++ b/fs/proc_namespace.c
@@ -95,9 +95,9 @@
 {
 	struct proc_mounts *p = m->private;
 	struct mount *r = real_mount(mnt);
-	int err = 0;
 	struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };
 	struct super_block *sb = mnt_path.dentry->d_sb;
+	int err;
 
 	if (sb->s_op->show_devname) {
 		err = sb->s_op->show_devname(m, mnt_path.dentry);