use size_t for string lengths

static

char *appendstring(char *string, /* original string */

                   char *buffer, /* to append */

                   int *stringlen, int *stralloc)

                   size_t *stringlen, /* length of string */

                   size_t *stralloc)  /* allocated size */

{

  int len = strlen(buffer);

  int needed_len = len + *stringlen;

  size_t len = strlen(buffer);

  size_t needed_len = len + *stringlen;

  if(needed_len >= *stralloc) {

    char *newptr;

    long newsize = needed_len*2; /* get twice the needed size */

    size_t newsize = needed_len*2; /* get twice the needed size */

    newptr = realloc(string, newsize);

    if(newptr) {

  char display = 0;

  char *string;

  int stringlen=0;

  int stralloc=256;

  size_t stringlen=0;

  size_t stralloc=256;

  enum {

    STATE_OUTSIDE,