Unused temp values in the zj_strToLong et al

[JCash]

There is an inconsistency in the implementation of the string to number functions. Only the zj_strToInt function uses the s variable in the string conversion. The other functions use the input argument.

static inline int zj_strToInt(const char *str, zj_Size len) {
  char s[128] = {0};
  memcpy(s, str, len);
  return atoi(s);
}
static inline long zj_strToLong(const char *str, zj_Size len) {
  char s[128] = {0};
  memcpy(s, str, len);
  return atol(str);
}
static inline long long zj_strToLongLong(const char *str, zj_Size len) {
  char s[128] = {0};
  memcpy(s, str, len);
  return atoll(str);
}
static inline double zj_strToDouble(const char *str, zj_Size len) {
  char s[128] = {0};
  memcpy(s, str, len);
  return atof(str);
}