Update src/CsvHelper/CsvParser.cs
Update src/CsvHelper/CsvParser.cs

When the GetChar method detects the end of buffer after reading a '\r'
character, it does not reset fieldLength after appending fieldLength
characters to field.  As a result, the calling method will
incorrectly append another field length characters from the new
buffer to the current field.
ErikSchierboom/CsvHelper,KeesDijk/CsvHelper,kyllix/CsvHelper,dhalsim/CsvHelper,erdincay/CsvHelper,xenonsin/CsvHelper,ravensorb/CsvHelper