Empty matchScore in inputfile creates error

[PRijnbeek]

Had to debug to find the problem in the file that caused this issue (not sure why the field was empty). I would be nice if the error messages says on which line the error occurred.

Also suggest to add this in ReadCodeMappingsFrom File here

try {
buffer.matchScore = row.getDouble("matchScore");
} catch (Exception e) {
buffer.matchScore = 0;
}