Fixed typo.

vfs/extfs.c

@@ -49,7 +49,7 @@
 static struct extfs_entry *
 extfs_find_entry (struct extfs_entry *dir, char *name, int make_dirs, int make_file);
 
-static struct extfs_archive *first_archive = NULL;;
+static struct extfs_archive *first_archive = NULL;
 static int extfserrno = 0;
 static struct stat hstat;		/* Stat struct corresponding */
 static char *current_file_name, *current_link_name;