🚀 go-pugleaf

Does free() return a value?  It used to, in 5.02.  I just installed 5.04, and
attempted to recompile some things, and got errors when checking free() to see
if it returns a fail code.

/* silly code example */
#include <stdlib.h>

main()
{
  char *temp;

  temp = malloc (6);
  strcpy(temp,"Hello");
  if (free(temp) != 0)
    return (1);
  return (0);
}

compile with 
>lc -L tmp.

  if(free(temp) != 0);
                 ^
tmp.c 7 Error 91: illegal void operand


Any ideas out there?  Am I using something wrong that managed to get by 5.02
all right?

-Todd C.