Optlink Contribution

[Jonathan Marler via Digitalmars-d]

It looks like the easiest way to fix the bug is to change the 
get_filename function to support non HPFS characters.  I'm 
guessing this was originally written to run exclusively on HPFS 
systems?  Is this tool still suppose to support HPFS file 
systems?  If so maybe we could add a runtime check to see what 
kind of fs the program is being run on (or a compile time check 
if we are guaranteed that each system with a different file 
system will use a different build, I'm guessing this is not the 
case.)  If HPFS does not need to be supported then the fix is 
really easy.

I also found a buffer overrun bug in the get_filename function 
(if your filename does not have an ending quote).