Fix the makeinfo version check
Fix the makeinfo version check

I was wondering why documentation wasn't built anymore. It failed for
texi2any (GNU texinfo) 6.4.90.

hammera/liblouis,BueVest/liblouis,BueVest/liblouis,BueVest/liblouis,BueVest/liblouis,liblouis/liblouis,hammera/liblouis,liblouis/liblouis,liblouis/liblouis,hammera/liblouis,hammera/liblouis,liblouis/liblouis,liblouis/liblouis,BueVest/liblouis,hammera/liblouis,liblouis/liblouis,BueVest/liblouis,hammera/liblouis