Fix the line count calculation

[Aaron Lun]

at

kaori/include/kaori/FastqReader.hpp

Lines 68 to 77 in 5d3214a

 // Processing the sequence itself until we get to a '+'. 
 sequence.clear(); 
 val = advance_and_check(); 
 while (val != '+') { 
     if (val != '\n') { 
         sequence.push_back(val); 
     } 
     val = advance_and_check(); 
 } 
 ++line_count; 

it's probably unnecesarry to check val != '+' at each iteration, given that should only happen after a newline.