Error state when std::getline finds no header

[tjgalvin]

This was introduced in #17 .

I've found that when attempting to train a SOM initialized with the a previous SOM output file that there will be readSOM errors raised. Testing the code out I think that the std::getline is getting into an error state as it unsuccessfully searches for the # END OF HEADER string in a file without one. If a file does not contain the # END OF HEADER it will eventually get to the end of a file and attempt to read in a new line, at which point an error is encountered and subsequent seekg will no longer work.

This behavior can be seen by inspecting the is.eof() bit before and after the scan of the header is performed.

Fixing it requires a is.clear() to be added. I am not sure if the problem persists in other areas of the code.

[tjgalvin]

Created pull request #19 that fixes the issue for my testing

[BerndDoser]

Thanks for fixing. I had included is.clear() for the images but, unfortunately, forgotten for the SOM.

[tjgalvin]

I noticed that after I fixed the readSOM bug. Started wondering why I only saw it with the SOM and not images. If I read that first I would have saved about an hour of debugging!