modified function			file            line#		date        by              reason
=================			====		        =====		====		    ==			        ======
qh_exit               usermem_r.c		  43		  2012/04/03	David Sterratt	To fix warnings about exit being called
qh_printf             userprintf_r.c  55      2018/05/21  David Sterratt  Printing error messages
qh_printf             userprintf_r.c  63      2018/05/21  David Sterratt  Printing error messages
qh_printf             userprintf_r.c  72      2018/05/21  David Sterratt  Printing error messages
