Official patch #3 for Calctool v2.1 - please apply it.

[Rich Burridge]

This is the third official patch to Calctool v2.1. Please apply it.

It fixes the following problem.

 * it finally fixes the trigonometrical functions.
   Many thanks to Scott Sutherland (scott at bu-ma.bu.edu)
   for this.

    Rich.

------CUT HERE------CUT HERE------
*** original/functions.c        Sat Feb 13 21:03:56 1988
--- functions.c Sat Feb 13 21:07:25 1988
***************
*** 431,438 ****
                   break ;
        case 't' : tresults[RAD] = tan(temp) ;   /* tan. */
      }
!   tresults[DEG]  = disp_val * 180.0 / M_PI ;
!   tresults[GRAD] = disp_val * 200.0 / M_PI ;

    cur_op = current ;
    show_display(tresults[ttype]) ;
--- 431,438 ----
                   break ;
        case 't' : tresults[RAD] = tan(temp) ;   /* tan. */
      }
!   tresults[DEG]  = tresults[RAD] ;
!   tresults[GRAD] = tresults[RAD] ;

    cur_op = current ;
    show_display(tresults[ttype]) ;
*** original/patchlevel.h       Sat Feb 13 21:03:56 1988
--- patchlevel.h        Sat Feb 13 21:07:55 1988
***************
*** 18,21 ****
   *  reported to me then an attempt will be made to fix them.
   */

! #define  PATCHLEVEL  2
--- 18,21 ----
   *  reported to me then an attempt will be made to fix them.
   */

! #define  PATCHLEVEL  3