Fix typos.

src/barcode/barcode.cpp

@@ -775,7 +775,7 @@ TQValueVector<int> Decoder_EAN13::decode( TQValueVector< TQValueVector<int> > fi
 
 MatchMakerResult Decoder_EAN13::recognizeNumber( TQValueVector< TQValueVector<int> > fields, int code_table_to_use)
 {
-  // convert the pixel lenghts of the four black&white fields into
+  // convert the pixel lengths of the four black&white fields into
   // normed values that have together a length of 70;
   int pixel_sum = fields[0][1] + fields[1][1] + fields[2][1] + fields[3][1];
   int b[4];
@@ -789,7 +789,7 @@ MatchMakerResult Decoder_EAN13::recognizeNumber( TQValueVector< TQValueVector<in
   fprintf( stderr, "normed lengths: %i %i %i %i\n", b[0], b[1], b[2], b[3] );
 #endif
 
-  // try to detect the digit that is encoded by the set of four normed bar lenghts:
+  // try to detect the digit that is encoded by the set of four normed bar lengths:
   int max_difference_for_acceptance = 60;
   int temp;