count arguments

argc.c

static unsigned char _cli_count_arguments(t_cli_ctx *a_ctx) {
	char *cur = a_ctx->cmd;
	unsigned char cnt = 0;
	for(;;) {
		while (*cur == ' ') cur++;
		if (*cur == '\0') break;
		cnt++;
		while (*cur != '\0' && *cur != ' ') {
			cur++;
		}
	}
	return cnt;
}