int pc_formatprompt(char *sounddir, char *file, char *prompt) {
	/* allocated the necessary memory amount */
	prompt = realloc(prompt, strlen(sounddir) + strlen(file) + 1);

	/* format the sound prompt */
	strcpy(prompt, sounddir);
	strncat(prompt, file, strlen(file) + 1);
	prompt[sizeof(prompt) - 1] = '\0';

	return 1;
}

ERROR in *:
Sep  4 01:57:21 WARNING[-182748240]: file.c:473 ast_openstream: File pho does not exist in any format
Sep  4 01:57:21 WARNING[-182748240]: file.c:761 ast_streamfile: Unable to open pho (format ULAW): No such file or directory


MESSAGES LOG:
Sep  4 02:05:25 DEBUG[-180352080]: PhoneCard: sounddir='phonecard/' - file='phonecard-enter-card-num' - prompt='pho'