void error_exit(variable_list)
- the message held in buffer errorstring[] and
- the message held in variable_list.
The format of ( variable_list ) is:
(format, arg1, arg2, ...)
where format, arg1, arg2, ... are the same as in printf. The function exits to the system after printing any error messages accumulated in im_errorstring due to calls to im_errormsg(3) .