5083 avoid undefined order of operations in assignments

*** 35,46 ****
   * University Acknowledgment- Portions of this document are derived from
   * software developed by the University of California, Berkeley, and its
   * contributors.
   */
  
- #pragma ident   "%Z%%M% %I%     %E% SMI"
- 
  #include "tdef.h"
  #include "tw.h"
  #include "ext.h"
  #include <ctype.h>
  
--- 35,44 ----
*** 269,279 ****
          int     base, wid;
          tchar i;
          int     delim, emsz, k;
          int     savhp, savapts, savapts1, savfont, savfont1, savpts, savpts1;
  
!         base = numtab[ST].val = numtab[ST].val = wid = numtab[CT].val = 0;
          if (ismot(i = getch()))
                  return (0);
          delim = cbits(i);
          savhp = numtab[HP].val;
          numtab[HP].val = 0;
--- 267,277 ----
          int     base, wid;
          tchar i;
          int     delim, emsz, k;
          int     savhp, savapts, savapts1, savfont, savfont1, savpts, savpts1;
  
!         base = numtab[ST].val = wid = numtab[CT].val = 0;
          if (ismot(i = getch()))
                  return (0);
          delim = cbits(i);
          savhp = numtab[HP].val;
          numtab[HP].val = 0;