less loops with lesspipe on RAR archive files with header encrypted

Binary package hint: less

lesspipe hangs probably in loop when a RAR archive is encrypted in its headers (see attachment or `rar a -hppassword arkNOT.rar file`)

simple solution:
--- lesspipe 2010-04-17 20:59:08.000000000 +0200
+++ lesspipeFIXRAR 2010-04-17 20:46:56.249990602 +0200
@@ -164,8 +164,8 @@
                                else echo "No pdftotext available"; fi ;;

                        *.rar|*.r[0-9][0-9])
- if [ -x "`which rar`" ]; then rar v "$1"
- elif [ -x "`which unrar`" ]; then unrar v "$1"
+ if [ -x "`which rar`" ]; then rar v -p- "$1"
+ elif [ -x "`which unrar`" ]; then unrar v -p- "$1"
                                else echo "No rar or unrar available"; fi ;;

                        *.rpm)

which will output none of the archive contents if the archive is fully encrypted (also header as per example file)
the output will be like:
RAR 3.90 beta 2 Copyright (c) 1993-2009 Alexander Roshal 3 Jun 2009
Shareware version Type RAR -? for help

/home/tst/SVN/arkNOT.rar (END)
At least it does not hang the shell terminal.

Good solution may be to always ask for password for RAR and then pass it to rar/unrar via the -p swithch (in case user pass null password on input then it would be -p-)