Invalid language code

[Peter Kronenberg]

If I pass in a non-existantlanguage code (i.e., the code matches the regular 
expression, but there is no corresponding language file in Tessdata), I am not 
getting any error message.  If I do it from the command line with Tesseract, I 
get an error, but with Tika, I'm not seeing any error in the logs.  Not sure 
why the error from Tesseract is not being displayed somewhere.    Tika just 
blindly calls Tesseract but then doesn't get any output back.  Is that the 
expected behavior?