version 2.4.3
fix incorrect #line
directives in win_flex.exe
see https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=542482
From versions 2.4.2:
backport parallel invocations of win_bison version 2.7
From version 2.4.1:
remove XSI extension syntax for fprintf
function (not implemented in windows)
this fixes Graphviz files generation for bison