Meaning of status codes returned by djpeg

["Edward C. Jones" <edcjones@comcast.net>]

Anyone know where I can find a list of the status codes returned by 
djpeg? I have looked in the djpeg source at "jerror.h". But the status 
code for "Premature end of JPEG file" is 512. But the enum in "jerror.h" 
does not have 512 lines. So the interpretaion of this enum may be be 
trivial.