find_++ returns a directory

[Jie Zhang]

Hi,

I'm testing installed GNU toolchain using dejagnu. I just encountered a 
problem that find_g++ returned a directory which happened to be named as 
g++ and located under $tool_root_dir. I expected it would return 
[transform g++]. I can work around this problem by naming that directory 
in a name other than g++. But I think adding a check on the return value 
of lookfor_file in all functions like find_g++ might be a better 
solution. Is it a good idea? If possible, I can try to work out a patch.


Jie