Improvement to hash

[Roman Rakus]

I would like to ask, if is possible make a small improvement.
Look at https://bugzilla.redhat.com/show_bug.cgi?id=430179
Maybe it will be good to change hash automatically, if bash fails to 
execute file. Something like:
1) execute file -> write in hash
2) remove file
3a) execute file -> find in hash -> not found -> remove from hash -> try 
to execute once again
3b) execute file -> find in hash -> not found -> remove from hash -> 
display error message like now, but if you execute once again, it will 
run (if is anywhere in PATH).

What do you think about this?


RR