Fix some warnings.

cde/programs/dtcalc/calctool.c

@@ -46,7 +46,6 @@
 #include "patchlevel.h"
 #include "calctool.h"
 #include "ds_common.h"
-#include "calctool.h"
 #include "text.h"
 
 static double max_fix[4] = {
@@ -1203,8 +1202,8 @@ make_number(int *MPnumber, BOOLEAN mkFix)
 
 /*ARGSUSED*/
 /* Default math library exception handling routine. */
-int
-matherr(struct exception *exc)
+void
+math_err(void)
 {
 #if 0
   char msg[100];
@@ -1232,7 +1231,6 @@ matherr(struct exception *exc)
 #endif
 
   doerr(vstrs[(int) V_ERROR]) ;
-  return(1) ;                     /* Value ignored. */
 }
 
 /* Convert string into an MP number. */

cde/programs/dtcalc/calctool.h

@@ -636,6 +636,7 @@ void make_items(void);
 void make_modewin(void);
 void make_fin_registers(void);
 void make_registers(int);
+void math_err(void);
 void MPstr_to_num(char *, enum base_type, int *);
 void paren_disp(char);
 void process_event(int);

cde/programs/dtcalc/functions.c

@@ -677,7 +677,7 @@ do_factorial(int *MPval, int *MPres)     /* Calculate the factorial of MPval. */
         }
       mpcim(&i, MPa) ;
       mpcmi(MP1, &i) ;
-      if (!i) matherr((struct exception *) NULL) ;
+      if (!i) math_err() ;
       else
         while (i > 0)
           {
@@ -687,7 +687,7 @@ do_factorial(int *MPval, int *MPres)     /* Calculate the factorial of MPval. */
             i-- ;
           }
     }
-  else matherr((struct exception *) NULL) ;
+  else math_err() ;
   mpstr(MPa, MPres) ;
 }