mount: Shrink mnt_entry_free a bit

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

mount.c

@@ -2209,14 +2209,13 @@ struct mount_info *mnt_entry_alloc()
 
 void mnt_entry_free(struct mount_info *mi)
 {
-	if (mi == NULL)
-		return;
-
+	if (mi) {
 		xfree(mi->root);
 		xfree(mi->mountpoint);
 		xfree(mi->source);
 		xfree(mi->options);
 		xfree(mi);
+	}
 }
 
 /*