diff -r 19be47c9bab7 -r 35b968619b0c sources/coloredline.cpp
--- a/sources/coloredline.cpp	Mon Dec 15 21:59:24 2014 +0200
+++ b/sources/coloredline.cpp	Mon Dec 15 22:35:17 2014 +0200
@@ -147,5 +147,6 @@
 	if (length() % cols != 0)
 		rows++;
 
+	print_to ("logfile", "Line of %1 chars with %2 cols is %3 rows\n", length(), cols, max (rows, 1));
 	return max (rows, 1);
 }